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Pizzoferrato AC, Thuillier C, Vénara A, Bornsztein N, Bouquet S, Cayrac M, Cornillet-Bernard M, Cotelle O, Cour F, Cretinon S, De Reilhac P, Loriau J, Pellet F, Perrouin-Verbe MA, Pourcelot AG, Revel-Delhom C, Steenstrup B, Vogel T, Le Normand L, Fritel X. Management of female pelvic organ prolapse-Summary of the 2021 HAS guidelines. J Gynecol Obstet Hum Reprod 2023; 52:102535. [PMID: 36657614 DOI: 10.1016/j.jogoh.2023.102535] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 01/12/2023] [Indexed: 01/18/2023]
Abstract
When a patient presents with symptoms suggestive of pelvic organ prolapse (POP), clinical evaluation should include an assessment of symptoms, their impact on daily life and rule out other pelvic pathologies. The prolapse should be described compartment by compartment, indicating the extent of the externalization for each. The diagnosis of POP is clinical. Additional exams may be requested to explore the symptoms associated or not explained by the observed prolapse. Pelvic floor muscle training and pessaries are non-surgical conservative treatment options recommended as first-line therapy for pelvic organ prolapse. They can be offered in combination and be associated with the management of modifiable risk factors for prolapse. If the conservative therapeutic options do not meet the patient's expectations, surgery should be proposed if the symptoms are disabling, related to pelvic organ prolapse, detected on clinical examination and significant (stage 2 or more of the POP-Q classification). Surgical routes for POP repair can be abdominal with mesh placement, or vaginal with autologous tissue. Laparoscopic sacrocolpopexy is recommended for cases of apical and anterior prolapse. Autologous vaginal surgery (including colpocleisis) is a recommended option for elderly and fragile patients. For cases of isolated rectocele, the posterior vaginal route with autologous tissue should be preferentially performed over the transanal route. The decision to place a mesh must be made in consultation with a multidisciplinary team. After the surgery, the patient should be reassessed by the surgeon, even in the absence of symptoms or complications, and in the long term by a primary care or specialist doctor.
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Affiliation(s)
- Anne-Cécile Pizzoferrato
- Department of Obstetrics and Gynaecology, La Miletrie University Hospital, Poitiers, France, INSERM CIC 1402, Poitiers University, Poitiers, France.
| | - Caroline Thuillier
- Department of Urology, Grenoble Alpes University Hospital, Grenoble, France
| | - Aurélien Vénara
- Department of Digestive Surgery, Angers University Hospital, Angers, France
| | - Nicole Bornsztein
- General practice office, Evry France, College of General Medicine, Paris, France
| | - Sylvain Bouquet
- General practice office, Lamastre, France, College of General Medicine, Paris, France
| | - Mélanie Cayrac
- GYNEPOLE, Obstetrics and Gynecology Center, Montpellier, France
| | | | - Odile Cotelle
- Department of Obstetrics and Gynaecology, AP-HP, GHU Sud, Antoine Béclère Hospital, Clamart, France
| | - Florence Cour
- Department of Urology, Foch Hospital, University of Versailles-Saint-Quentin-en-Yvelines, Suresnes, France
| | - Sophie Cretinon
- Department of Obstetrics and Gynaecology, AP-HP Louis Mourier Hospital, Colombes, France
| | | | - Jérôme Loriau
- Department of Digestive Surgery, St-Joseph Hospital, Paris, France
| | - Françoise Pellet
- French Association of Gougerot Sjögren and Dry Syndromes, Paris, France
| | | | - Anne-Gaëlle Pourcelot
- Department of Gynecology and Obstetrics, AP-HP, GHU-Sud, Bicêtre Hospital, Le Kremlin Bicêtre, France
| | - Christine Revel-Delhom
- Clinical practice guidelines Unit, French National Authority for Health, Saint Denis La Plaine, France
| | | | - Thomas Vogel
- Geriatric Department, University Hospital of Strasbourg, Strasbourg, France
| | - Loïc Le Normand
- Department of Urology, Nantes University Hospital, Nantes, France
| | - Xavier Fritel
- Department of Obstetrics and Gynaecology, La Miletrie University Hospital, Poitiers, France, INSERM CIC 1402, Poitiers University, Poitiers, France
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2
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Cauvet Q, Bernecker B, Bouquet S, Canaud B, Hermeline F, Pichon S. Effect of collisions with a second fluid on the temporal development of nonlinear, single-mode, Rayleigh-Taylor instability. Phys Rev E 2022; 105:065205. [PMID: 35854511 DOI: 10.1103/physreve.105.065205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 04/16/2022] [Indexed: 06/15/2023]
Abstract
Goncharov's [Phys. Rev. Lett. 88, 134502 (2002)0031-900710.1103/PhysRevLett.88.134502] nonlinear model of a single-mode Rayleigh-Taylor instability (RTI) is investigated for a partially ionized plasma in a predominantly neutral background. Terminal bubble and spike velocities are derived from the nonlinear equations in the case where the RTI dynamics is dominated by collisions between neutrals and ions. Direct numerical simulations are used to justify the use of Goncharov's model in this regime and observe its limitations.
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Affiliation(s)
- Q Cauvet
- CEA, DAM, DIF, 91297 Arpajon, France
| | | | - S Bouquet
- CEA, DAM, DIF, 91297 Arpajon, France
| | - B Canaud
- CEA, DAM, DIF, 91297 Arpajon, France
| | | | - S Pichon
- CEA, DAM, DIF, 91297 Arpajon, France
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3
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Cracowski JL, Muller S, Anglade I, Bonnefond G, Bouhanick B, Bouquet S, Cabut S, Daynès P, Denis B, Durand D, Jonville-Béra AP, Lahouegue A, Léo M, Micallef J, Molimard M, Penfornis C, Querol-Ferrer V. Prevention of risks associated with inappropriate use/unnecessary consumption of medicines. Therapie 2022; 77:79-88. [PMID: 35078658 PMCID: PMC8783759 DOI: 10.1016/j.therap.2022.01.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
In the code of public health, misuse is defined as intentional and inappropriate use of a medicine or product, which is not in accordance with the terms of the marketing authorisation or the registration as well as with good practice recommendations. Very often this involves an individual or the interaction of several individuals including the patient, his/her carers, prescriber(s) and/or dispensers. Misuse is common; it is the source of medicinal adverse effects for which a significant part is avoidable. Medicines initially prescribed or dispensed in the context of their marketing authorization (MA) can also be the subject of primary dependency and misappropriation. Companies which develop medicines nationally make declarations to the ANSM (French National Agency for the Safety of Medicines and Health Products) and implement measures to limit non-compliant use of their products. Recently, the coronavirus disease-2019 (COVID-19) pandemic has highlighted the influence and societal impact of drug misuse. The finding of the existence of systemic misuse, the impossibility of proposing simple solutions leads us to propose two main areas for improved information and the training of users and health professionals in medicines in the context of multi-faceted interventions: prevention of misuse on the one hand and its identification and treatment on the other hand.
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Affiliation(s)
| | | | | | | | - Béatrice Bouhanick
- Service d'hypertension artérielle et thérapeutique PCVM, UMR 1027, université de Toulouse 3, CHU de Rangueil, 31059 Toulouse, France
| | | | | | - Pascale Daynès
- Formation recherche, union francophone patients partenaire, 75012 Paris, France
| | - Bernard Denis
- Formation recherche, union francophone patients partenaire, 75012 Paris, France
| | | | | | - Amir Lahouegue
- Pharmacovigilance et information médicale, AstraZeneca, 92400 Courbevoie, France
| | | | - Joëlle Micallef
- CRPV, CEIP-addictovigilance, pharmacologie Aix-Marseille universités, 13005 Marseille, France
| | - Mathieu Molimard
- Inserm, BPH, U1219, pharmacoépidémiologie, université Bordeaux, 33000 Bordeaux, France
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4
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Cracowski JL, Muller S, Anglade I, Bonnefond G, Bouhanick B, Bouquet S, Cabut S, Daynès P, Denis B, Durand D, Jonville-Béra AP, Lahouegue A, Léo M, Micallef J, Molimard M, Penfornis C, Querol-Ferrer V. Prévention des risques liés à un usage inapproprié/consommation inutile des médicaments ☆. Therapie 2022; 77:69-78. [PMID: 35067334 PMCID: PMC9832316 DOI: 10.1016/j.therap.2021.12.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 12/21/2021] [Indexed: 01/14/2023]
Abstract
Le mésusage est défini dans le Code de santé publique comme une utilisation intentionnelle et inappropriée d’un médicament ou d’un produit, non conforme à l’autorisation de mise sur le marché ou à l’enregistrement ainsi qu’aux recommandations de bonnes pratiques. On retrouve un acteur ou plus souvent l’interaction de plusieurs acteurs parmi lesquels le patient, ses aidants, le ou les prescripteurs et le ou les dispensateurs. Le mésusage est fréquent, il est source d’effets indésirables médicamenteux dont une partie importante est évitable. Des médicaments initialement prescrits ou dispensés dans le cadre de leur autorisation de mise sur le marché (AMM) peuvent également faire l’objet de dépendance primaire et de détournement. Les entreprises qui exploitent un médicament sur le territoire national déclarent auprès de l’ANSM et mettent en place des mesures pour limiter l’usage non conforme de leurs produits. Récemment, le contexte de la pandémie coronavirus-19 (COVID-19) a mis en lumière l’influence et l’impact sociétal du mésusage médicamenteux. Le constat de l’existence d’un mésusage systémique, de l’impossibilité de proposer des solutions simplistes nous amène à proposer deux principaux axes d’amélioration de l’information et de la formation des usagers et des professionnels de santé sur les médicaments dans le cadre d’interventions multi-facettes : la prévention du mésusage, d’une part, son identification et sa prise en charge, d’autre part.
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Affiliation(s)
- Jean-Luc Cracowski
- Centre Régional de Pharmacovigilance de Grenoble, Université Grenoble Alpes, 38043 Grenoble, France,Auteur correspondant. Centre Régional de Pharmacovigilance, université Grenoble Alpes, 38043 Grenoble, France
| | | | | | | | - Béatrice Bouhanick
- Service d’hypertension artérielle et thérapeutique PCVM, UMR 1027, université de Toulouse 3, CHU de Rangueil, 31059 Toulouse, France
| | | | | | - Pascale Daynès
- Formation recherche, Union Francophone Patients partenaire, 75012 Paris, France
| | - Bernard Denis
- Formation recherche, Union Francophone Patients partenaire, 75012 Paris, France
| | | | | | - Amir Lahouegue
- Pharmacovigilance et information médicale, AstraZeneca, 92400 Courbevoie, France
| | | | - Joëlle Micallef
- Pharmacologie Aix-Marseille universités, CRPV, CEIP-Addictovigilance, 13005 Marseille, France
| | - Mathieu Molimard
- Université Bordeaux, INSERM, BPH, U1219, pharmacoépidémiologie, 33000 Bordeaux, France
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Fournier J, Rigaud JB, Bouquet S, Robisson B, Tria A, Dutertre JM, Agoyan M. Design and characterisation of an AES chip embedding countermeasures. IJIEI 2011. [DOI: 10.1504/ijiei.2011.044101] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Loupias B, Koenig M, Falize E, Bouquet S, Ozaki N, Benuzzi-Mounaix A, Vinci T, Michaut C, Rabec le Goahec M, Nazarov W, Courtois C, Aglitskiy Y, Faenov AY, Pikuz T. Supersonic-jet experiments using a high-energy laser. Phys Rev Lett 2007; 99:265001. [PMID: 18233581 DOI: 10.1103/physrevlett.99.265001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2007] [Indexed: 05/25/2023]
Abstract
In this Letter, laboratory astrophysical jet experiments performed with the LULI2000 laser facility are presented. High speed plasma jets (150 km.s(-1)) are generated using foam-filled cone targets. Accurate experimental characterization of the plasma jet is performed by measuring its time evolution and exploring various target parameters. Key jet parameters such as propagation and radial velocities, temperature, and density are obtained. For the first time, the required dimensionless quantities are experimentally determined on a single-shot basis. Although the jets evolve in vacuum, most of the scaling parameters are relevant to astrophysical conditions.
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Affiliation(s)
- B Loupias
- LULI, Ecole Polytechnique, CNRS, CEA, UPMC, Route de Saclay, 91128 Palaiseau, France.
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Bouquet S, Regnier B, Quehen S, Brisson AM, Courtois P, Fourtillan JB. Rapid Determination of Acyclovir in Plasma by Reversed Phase High-Performance Liquid Chromatography. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/01483918508074085] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Bouquet S, Aucouturier P, Brisson AM, Courtois P, Fourtillan JB. High-Performance Liquid Chromatographic Determination in Human Plasma of a Anticonvulsant Benzodiazepine: Clonazepam. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/01483918308066891] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Dupuis A, Minet P, Couet W, Courtois P, Bouquet S. Rapid and Sensitive Determination of Meropenem in Rat Plasma by High Performance Liquid Chromatography. J LIQ CHROMATOGR R T 2006. [DOI: 10.1080/10826079808003598] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- A. Dupuis
- a Institut des Xénobiotiques , EA 1223 UFR de Médecine et Pharmacie, 34, rue du Jardin des Plantes, 86034, Poitiers Cedex, France
- b Laboratoire de Pharmacocinétique CHU la Milétrie , 86021, Poitiers, France
| | - Ph. Minet
- a Institut des Xénobiotiques , EA 1223 UFR de Médecine et Pharmacie, 34, rue du Jardin des Plantes, 86034, Poitiers Cedex, France
| | - W. Couet
- a Institut des Xénobiotiques , EA 1223 UFR de Médecine et Pharmacie, 34, rue du Jardin des Plantes, 86034, Poitiers Cedex, France
| | - Ph. Courtois
- a Institut des Xénobiotiques , EA 1223 UFR de Médecine et Pharmacie, 34, rue du Jardin des Plantes, 86034, Poitiers Cedex, France
| | - S. Bouquet
- a Institut des Xénobiotiques , EA 1223 UFR de Médecine et Pharmacie, 34, rue du Jardin des Plantes, 86034, Poitiers Cedex, France
- b Laboratoire de Pharmacocinétique CHU la Milétrie , 86021, Poitiers, France
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Bouquet S, Stéhlé C, Koenig M, Chièze JP, Benuzzi-Mounaix A, Batani D, Leygnac S, Fleury X, Merdji H, Michaut C, Thais F, Grandjouan N, Hall T, Henry E, Malka V, Lafon JPJ. Observation of laser driven supercritical radiative shock precursors. Phys Rev Lett 2004; 92:225001. [PMID: 15245230 DOI: 10.1103/physrevlett.92.225001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2002] [Indexed: 05/24/2023]
Abstract
We present a supercritical radiative shock experiment performed with the LULI nanosecond laser facility. Using targets filled with xenon gas at low pressure, the propagation of a strong shock with a radiative precursor is evidenced. The main measured shock quantities (electronic density and propagation velocity) are shown to be in good agreement with theory and numerical simulations.
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Affiliation(s)
- S Bouquet
- Département de Physique Théorique et Appliquée, CEA-DIF, BP 12, 91680 Bruyères-le-Châtel, France
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Barbot A, Venisse N, Rayeh F, Bouquet S, Debaene B, Mimoz O. Pharmacokinetics and pharmacodynamics of sequential intravenous and subcutaneous teicoplanin in critically ill patients without vasopressors. Intensive Care Med 2003; 29:1528-34. [PMID: 12856119 DOI: 10.1007/s00134-003-1859-z] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2002] [Accepted: 05/15/2003] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To compare the pharmacokinetic parameters of sequential intravenous and subcutaneous teicoplanin in the plasma of surgical intensive care unit patients. DESIGN AND SETTING Prospective, randomized, crossover study in the surgical ICU of a university hospital. PATIENTS Twelve patients with a suspected nosocomial infection, a serum albumin level higher than 10 g/l, body mass index less than 28 kg/m(2), and estimated creatinine clearance higher than 70 ml/min. INTERVENTIONS Teicoplanin was first administered intravenously as a loading dose of 6 mg/kg per 12 h for 48 h and then continued at a daily dose of 6 mg/kg. On the fourth day patients were randomized in two groups according to the order of the pharmacokinetic studies. MEASUREMENTS AND RESULTS Serial plasma samples were obtained to measure teicoplanin levels. Compared with a 30-min intravenous infusion the peak concentration of teicoplanin after a 30-min subcutaneous administration occurred later (median 7 h, range 5-18) and was lower (16 micro g/ml, 9-31; vs. 73, 53-106). Despite large and unpredictable interindividual differences no significant differences between subcutaneous and intravenous administration were observed in: trough antibiotic concentrations (10 micro g/ml, 6-24; vs. 9, 5-30), the area under the teicoplanin plasma concentration vs. time curves from 0 to 24 h (AUC(0-24h); 309 micro g/ml per minute, 180-640; vs. 369, 171-955), the proportion of the dosing interval during which the plasma teicoplanin concentration exceeded 10 micro g/ml (96%, 0-100%; vs. 79%, 13-100%), and the ratio of AUC(0-24h) to 10 (77, 45-160; vs. 92, 43-239). CONCLUSIONS In critically ill patients without vasopressors a switch to the subcutaneous teicoplanin after an initial intravenous therapy seems to give comparable pharmacodynamic indexes of therapeutic success.
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Affiliation(s)
- A Barbot
- Département d'Anesthésie-Réanimation Chirurgicale, Centre Hospitalier et Universitaire, Cité de la Milétrie, 86021 Poitiers Cedex, France
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Dupuis A, Limosin A, Paquereau J, Mimoz O, Couet W, Bouquet S. Pharmacokinetic-pharmacodynamic modeling of electroencephalogram effect of imipenem in rats with acute renal failure. Antimicrob Agents Chemother 2001; 45:3607-9. [PMID: 11709350 PMCID: PMC90879 DOI: 10.1128/aac.45.12.3607-3609.2001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The epileptogenic activity of imipenem was investigated in rats with experimental renal failure induced by uranyl nitrate injection by using electroencephalogram (EEG) recording and a pharmacokinetic-pharmacodynamic model including an effect compartment. Results previously obtained with healthy rats were used to estimate the dose of imipenem required to induce an observable but nonlethal EEG effect on the assumption that only the pharmacokinetic parameters of the model would be affected by renal failure. Good agreement was observed between the predicted and observed effects.
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Affiliation(s)
- A Dupuis
- Laboratoire de Biopharmacie, Faculté de Médecine & Pharmacie, Poitiers, France
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13
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Marchand S, Pariat C, Boulanger A, Bouquet S, Couet W. A pharmacokinetic/pharmacodynamic approach to show that not all fluoroquinolones exhibit similar sensitivity toward the proconvulsant effect of biphenyl acetic acid in rats. J Antimicrob Chemother 2001; 48:813-20. [PMID: 11733465 DOI: 10.1093/jac/48.6.813] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The proconvulsant effect of biphenyl acetic acid (BPAA) on several fluoroquinolones (FQs) was investigated in vivo, by measuring drug concentrations in the biophase at the onset of convulsions. Male Sprague-Dawley rats (n = 134) were given BPAA orally, at various doses 1 h before starting FQ infusion, which was maintained until the onset of maximal seizures, when cerebrospinal fluid (CSF) and plasma samples were collected for drug concentration determination. The FQ-BPAA interactions in the biophase (CSF) were adequately described on most occasions by an inhibitory Emax effect model with a baseline effect parameter. The efficacy of the proconvulsant effect was characterized by the ratio of the CSF concentrations of FQs at the onset of convulsant activity when BPAA was absent (CCSF0, FQs) and as BPAA CSF concentrations tended toward infinity (CCSFbase, FQs). This ratio varied from 15 for enoxacin to 1.9 for sparfloxacin. The potency of the proconvulsant effect was characterized by the CSF concentration of BPAA corresponding to a proconvulsant effect half of its maximum. This parameter varied between 0.18 +/- 0.06 micromol/L with enoxacin and 15.0 +/- 12.1 micromol/L with sparfloxacin. The CSF diffusion of all FQs was apparently non-linear, as well as the plasma protein binding of BPAA, complicating interpretation of plasma data. The important variability in the proconvulsant effect of BPAA demonstrated in this study between various FQs suggests that in vitro gamma-aminobutyric acid (GABA) binding experiments conducted in the presence of BPAA are unlikely to be good predictors of FQ convulsant risk in clinical practice.
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Affiliation(s)
- S Marchand
- Equipe 'Médicament et BHE', Laboratoire de Pharmacie Galénique et de Biopharmacie, Faculté de Médecine and Pharmacie, 34 rue du Jardin des Plantes, BP 199, 86005 Poitiers Cedex, France
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14
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Dupuis A, Couet W, Paquereau J, Debarre S, Portron A, Jamois C, Bouquet S. Pharmacokinetic-pharmacodynamic modeling of the electroencephalogram effect of imipenem in healthy rats. Antimicrob Agents Chemother 2001; 45:1682-7. [PMID: 11353611 PMCID: PMC90531 DOI: 10.1128/aac.45.6.1682-1687.2001] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A pharmacokinetic-pharmacodynamic (PK-PD) modeling approach was developed to investigate the epileptogenic activity of imipenem in rats. Initially, animals received an intravenous infusion of imipenem at a rate of 2.65 mg min(-1) for 30 min. Blood samples were collected for drug assay, and an electroencephalogram (EEG) was recorded during infusion and postinfusion. A dramatic delay was observed between concentrations of imipenem in serum and the EEG effect; this effect was accompanied by tremors and partial seizures. Indirect-effect models failed to describe these data, which were successfully fitted using an effect compartment model. The relationship between effect and concentration at the effect site was best described by a spline function. The elimination rate constant from the effect compartment was severalfold lower than that from the central compartment. The robustness of the model was then confirmed after administering the imipenem dose over 60 and 90 min. In conclusion, the successful PK-PD modeling of the imipenem EEG effect in rats constitutes a major improvement for better prediction of the epileptogenic risk associated with this antibiotic.
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Affiliation(s)
- A Dupuis
- Laboratoire de Biopharmacie, Faculté de Médecine & Pharmacie, 86005 Poitiers Cedex, France
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Abstract
BACKGROUND Beta-2 agonists such as salbutamol are used, not only by asthmatic athletes to prevent exercise induced asthma, but also by non-asthmatic athletes as a potentially ergogenic agent. We have investigated whether inhaled salbutamol enhances endurance performance in non-asthmatic athletes. METHODS A prospective double blind, randomised, three way crossover design was used to study the effects of 200 microg and 800 microg inhaled salbutamol versus a placebo in 12 trained triathletes. The treatments were compared in three identical cycle ergometer sessions at 85% of the predetermined maximal oxygen uptake. Lung function, endurance time, metabolic parameters (glucose, potassium, lactate, free fatty acid, and glycerol), and psychomotor performance were evaluated. RESULTS Neither endurance time nor post-exercise bronchodilation were significantly different between the treatments. Metabolic parameters were affected by exercise but not by treatment. CONCLUSIONS Inhaled salbutamol, even in a high dose, did not have a significant effect on endurance performance in non-asthmatic athletes, although the bronchodilating effect of the drug at the beginning of exercise may have improved respiratory adaptation. Our results do not preclude an ergogenic effect of beta2 agonists given by other routes or for a longer period.
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Affiliation(s)
- C Goubault
- Service d'Explorations Fonctionnelles, Physiologie Respiratoire et de l'Exercice, CHU de Poitiers, 86021 Poitiers, France
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Goubault C, Perault MC, Leleu E, Bouquet S, Legros P, Vandel B, Denjean A. Effects of inhaled salbutamol in exercising non-asthmatic athletes. Thorax 2001. [DOI: 10.1136/thx.56.9.675] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUNDBeta-2 agonists such as salbutamol are used, not only by asthmatic athletes to prevent exercise induced asthma, but also by non-asthmatic athletes as a potentially ergogenic agent. We have investigated whether inhaled salbutamol enhances endurance performance in non-asthmatic athletes.METHODSA prospective double blind, randomised, three way crossover design was used to study the effects of 200 μg and 800 μg inhaled salbutamol versus a placebo in 12 trained triathletes. The treatments were compared in three identical cycle ergometer sessions at 85% of the predetermined maximal oxygen uptake. Lung function, endurance time, metabolic parameters (glucose, potassium, lactate, free fatty acid, and glycerol), and psychomotor performance were evaluated.RESULTSNeither endurance time nor post-exercise bronchodilation were significantly different between the treatments. Metabolic parameters were affected by exercise but not by treatment.CONCLUSIONSInhaled salbutamol, even in a high dose, did not have a significant effect on endurance performance in non-asthmatic athletes, although the bronchodilating effect of the drug at the beginning of exercise may have improved respiratory adaptation. Our results do not preclude an ergogenic effect of β2 agonists given by other routes or for a longer period.
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de Lange EC, Marchand S, van den Berg D, van der Sandt IC, de Boer AG, Delon A, Bouquet S, Couet W. In vitro and in vivo investigations on fluoroquinolones; effects of the P-glycoprotein efflux transporter on brain distribution of sparfloxacin. Eur J Pharm Sci 2000; 12:85-93. [PMID: 11102735 DOI: 10.1016/s0928-0987(00)00149-4] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The role of mdr1a-encoded P-glycoprotein on transport of several fluoroquinolones across the blood-brain barrier was investigated. In vitro, P-glycoprotein substrates were selected by using a confluent monolayer of MDR1-LLC-PK1 cells. The inhibition of fluoroquinolones (100 microM) on transport of rhodamine-123 (1 microM) was compared with P-glycoprotein inhibitors verapamil (20 microM) and SDZ PSC 833 (2 microM). Subsequently, transport polarity of fluoroquinolones was studied. Sparfloxacin showed the strongest inhibition (26%) and a large polarity in transport, by P-glycoprotein activity. In vivo, using mdr1a (-/-) and wild-type mice, brain distribution of pefloxacin, norfloxacin, ciprofloxacin, fleroxacin and sparfloxacin was determined at 2, 4, and 6 h following intra-arterial infusion (50 nmol/min). Brain distribution of sparfloxacin was clearly higher in mdr1a (-/-) mice compared with wild-type mice. Sparfloxacin was infused (50 nmol/min) for 1, 2, 3 and 4 h in which intracerebral microdialysis was performed. At 4 h, in vivo recovery (dynamic-no-net-flux method) was 6.5+/-2.2 and 1.5+/-0.5%; brain(ECF) concentrations were 5.1+/-0.2 and 26+/-21 microM; and total brain concentrations were 7.2+/-0.3 and 23+/-0.3 microM in wild-type and mdr1a (-/-) mice, respectively. Plasma concentrations were similar (18.4+/-0.7 and 17.9+/-0.5 microM, respectively). In conclusion, sparfloxacin enters the brain poorly mainly because of P-glycoprotein activity at the blood-brain barrier.
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Affiliation(s)
- E C de Lange
- Leiden/Amsterdam Center for Drug Research, Division of Pharmacology, Sylvius Laboratory, Leiden University, P.O. Box 9503, 2300 RA, Leiden, The Netherlands.
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Abstract
The main objective of this study was to compare the cerebrospinal fluid (CSF) diffusion of imipenem and meropenem at steady state, following intravenous infusions at various rates in rats. A preliminary experiment was conducted to estimate the elimination half-lives of these two carbapenem antibiotics, and then to evaluate the infusion duration necessary to reach steady state. CSF diffusion of imipenem was essentially linear over the wide range of infusion rates (66-1,320microg min(-1)) and corresponding steady-state plasma concentrations (11.7-443.0 microg mL(-1)). Conversely the CSF diffusion of meropenem was saturable, with a predicted maximum CSF concentration equal to 1.3 microg mL(-1). Extrapolation of these data to the clinical situation may not be possible since the rats had normal blood-brain and blood-CSF barriers whereas patients with diseases such as meningitis may not. However, it is suggested that the observed differences in the diffusion characteristics of imipenem and meropenem may be partly responsible for their differences in toxicity and efficacy at the central level.
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Affiliation(s)
- A Dupuis
- UPRES-EA 1223, Faculté de Medecine & Pharmacie and tLaboratoire de Pharmacocinétique, CHU la Milétrie, Poitiers, France
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Dupuis A, Pariat C, Courtois P, Couet W, Bouquet S. Imipenem but not meropenem induces convulsions in DBA/2 mice, unrelated to cerebrospinal fluid concentrations. Fundam Clin Pharmacol 2000; 14:163-5. [PMID: 10796065 DOI: 10.1111/j.1472-8206.2000.tb00406.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Imipenem and meropenem CSF diffusion was comparable in DBA/2 mice but only imipenem induced convulsions, not related to CSF concentration.
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Affiliation(s)
- A Dupuis
- Laboratoire de pharmacie galénique et biopharmacie, faculté de médecine & pharmacie, Poitiers, France
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Lacoste L, Bouquet S, Ingrand P, Caritez JC, Carretier M, Debaene B. Intranasal midazolam in piglets: pharmacodynamics (0.2 vs 0.4 mg/kg) and pharmacokinetics (0.4 mg/kg) with bioavailability determination. Lab Anim 2000; 34:29-35. [PMID: 10759364 DOI: 10.1258/002367700780578073] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Intranasal midazolam was studied in two series of piglets: series 1, n = 20 (18 +/- 3 kg), a randomized double blind pharmacodynamic study to compare doses of 0.2 mg/kg and 0.4 mg/kg; series 2, n = 9 (42 +/- 8 kg), a pharmacokinetic study with a 0.4 mg/kg dose administered either intravenously (i.v.) or intranasally (i.n.) in a cross-over protocol with a one-week wash-out period between each. In series 1, midazolam caused significant anxiolysis and sedation within 3 to 4 min, without a significant difference between 0.2 and 0.4 mg/kg doses for any of the studied parameters. In series 2, after intranasal midazolam administration of 0.4 mg/kg, plasma concentrations attained a maximum (Cmax) of 0.13 +/- 0.04 mg/l at 5 min (median Tmax) and remained higher than 0.04 mg/l until 60 min. The bioavailability factor (F) in this study was F = 0.64 +/- 0.17 by the intranasal route. The terminal half-life (T1/2 lambda z) = 145 +/- 138 min was comparable with the i.v. administration half-life (158 +/- 127 min). In conclusion, optimal intranasal midazolam dose in piglets was 0.2 mg/kg, which procures rapid and reliable sedation, adapted to laboratory piglets.
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Affiliation(s)
- L Lacoste
- Department of Genetics, INRA le Magneraud, University of Poitiers School of Medicine, France
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Delon A, Levasseur LM, Giraudon M, Bouquet S, Couet W. Antagonistic interaction between the convulsant activities of pefloxacin and its main metabolite norfloxacin in rats. Pharm Res 1999; 16:1894-7. [PMID: 10644081 DOI: 10.1023/a:1011967813140] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- A Delon
- UPRES EA 1223, Faculté de Médecine & Pharmacie, Poitiers, France
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Delon A, Bouquet S, Huguet F, Brunet V, Courtois P, Couet W. Pharmacokinetic-pharmacodynamic contributions to the convulsant activity of fluoroquinolones in rats. Antimicrob Agents Chemother 1999; 43:1511-5. [PMID: 10348785 PMCID: PMC89311 DOI: 10.1128/aac.43.6.1511] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The in vivo convulsant activities in rats of five representative fluoroquinolones (FQs), norfloxacin, enoxacin, sparfloxacin, fleroxacin, and pefloxacin, were compared. The experimental approach allowed distinction between the drugs' ability to reach the pharmacological receptors at the level of the central nervous system (pharmacokinetic contribution) and their ability to interact with these receptors (pharmacodynamic contribution). The presence of a methyl group on the piperazine moiety decreased the pharmacodynamic contribution to the convulsant activity by severalfold, and the ratios of concentrations of the FQs in cerebrospinal fluid (CSF) to concentrations of unbound FQs in plasma varied from about 5 to 75% as a function of lipophilicity. Interestingly, FQs with the highest intrinsic convulsant activities had the lowest levels of diffusion in CSF and vice versa. This in vivo approach provides information complementary to that of in vitro experiments and should be recommended for early preclinical assessment of a new FQ's epileptogenic risk.
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Affiliation(s)
- A Delon
- EA 1223, Faculté de Médecine & Pharmacie, Universite de Poitiers, Poitiers, France
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Delon A, Pariat C, Courtois P, Bouquet S, Couet W. A new approach for early assessment of the epileptogenic potential of quinolones. Antimicrob Agents Chemother 1998; 42:2756-8. [PMID: 9756792 PMCID: PMC105934 DOI: 10.1128/aac.42.10.2756] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The epileptogenic potential of pefloxacin and norfloxacin, two quinolone antibiotics, was investigated in vivo in three different animal species by measuring drug concentrations in cerebrospinal fluid (CSF), which is part of the biophase, at the onset of convulsions. Interestingly, the pefloxacin-to-norfloxacin concentration ratios in CSF were virtually constant across the species (7.0, 6.6, and 6.0 in mice, rats, and rabbits, respectively), suggesting that this approach could be used to predict the relative epileptogenic potential of quinolones in humans.
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Affiliation(s)
- A Delon
- UPRES-EA 1223, Faculté de Médecine et Pharmacie, Poitiers, France
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Levasseur LM, Delon A, Greco WR, Faury P, Bouquet S, Couet W. Development of a new quantitative approach for the isobolographic assessment of the convulsant interaction between pefloxacin and theophylline in rats. Pharm Res 1998; 15:1069-76. [PMID: 9688062 DOI: 10.1023/a:1011938429379] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
PURPOSE A new mathematical approach was developed to quantify convulsant interaction between pefloxacin and theophylline in rats. METHODS Animals received each compound separately or in different combination ratios. Infusion was stopped at the onset of maximal seizures. Cerebrospinal fluid (CSF) and plasma samples were collected for HPLC drug determination. The nature and intensity of the pharmacodynamic (PD) interaction between drugs was assessed with a new modeling approach which includes (a) data transformation to create an essentially error-free X-variable and (b) estimation of an interaction parameter a by fitting a nonlinear hyperbolic model to the combination data with unweighted nonlinear regression. RESULTS Drug disposition to the biophase was linear within the range of administered doses. The estimates of a suggested a Loewe antagonistic interaction between pefloxacin and theophylline at the induction of maximal seizures in rats. Similar intensity of PD interaction was observed at the dose and biophase level (alpha was -0.415 +/- 0.069 and -0.567 +/- 0.079, respectively). CONCLUSIONS The suitability of the proposed model was assessed by Monte Carlo simulation. This new mathematical approach enabled the characterization of the Loewe antagonistic nature of the PD (convulsant) interaction between pefloxacin and theophylline, whereas previously used methodologies failed to do so.
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Affiliation(s)
- L M Levasseur
- Roswell Park Cancer Institute, Biomathematics Department, Buffalo, New York, USA
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Delon A, Huguet F, Courtois P, Vierfond JM, Bouquet S, Couet W. Pharmacokinetic-pharmacodynamic contributions to the convulsant activity of pefloxacin and norfloxacin in rats. J Pharmacol Exp Ther 1997; 280:983-7. [PMID: 9023315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The purpose of this investigation was to compare the convulsant activity of two quinolones differing, respectively, by the presence (pefloxacin) or absence (norfloxacin) of a methyl group on the piperazine moiety at the position 7 of their parent nuclei and consequently by their lipophilicity. An in vivo model was used, which can distinguish between ease in reaching pharmacological receptors at the central nervous system level, and ability to interact with these receptors. Male Sprague-Dawley rats (approximately 230g-300g) received an i.v. infusion of pefloxacin or norfloxacin at one of four different rates: 480, 960, 1440 and 1920 micromol/hr, until the onset of maximal seizures. This occurred after an average of 12.7 to 69.4 min. We found enough evidence to suggest that in these conditions the contribution of pefloxacin metabolites, including norfloxacin, to its convulsant activity was negligible. Doses of pefloxacin and concentrations in cerebrospinal fluid and plasma (total and unbound) at the pharmacodynamic endpoint were all independent of infusion rate, whereas only cerebrospinal fluid concentrations of norfloxacin were independent of infusion rate. The overall cerebrospinal fluid concentration of norfloxacin (47.3 +/- 9.9 micromol/liter) was about 8-fold lower than that of pefloxacin (380 +/- 27 micromol/liter), indicating that on average the "intrinsic convulsant activity" of norfloxacin is 8-fold greater than that of pefloxacin. However, total doses of pefloxacin and norfloxacin at the onset of maximal seizures were in the same order of magnitude (1500-2000 micromol/kg), suggesting that the higher ability of the more lipophilic pefloxacin to reach central nervous system compensates for its lower intrinsic convulsant activity.
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Affiliation(s)
- A Delon
- EA 1223, Faculté de Médecine and Pharmacie, Poitiers, France
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Abstract
The effect of tamoxifen on the pharmacokinetics of theophylline was investigated in male Sprague-Dawley rats. The oral administration of tamoxifen at a dose equal to 40 mg kg-1 48 h before the intravenous injection of theophylline 10 mg kg-1, significantly (P < 0.05) increased the clearance of theophylline by 39%, with no apparent effect on the volume of distribution. As a consequence, the elimination half-life of theophylline was significantly (P < 0.05) shortened in the tamoxifen-treated rats (3.56 +/- 0.39 h vs 5.25 +/- 0.48 h) as well as its mean residence time (5.04 +/- 0.60 h vs 7.50 +/- 0.75 h). Although these data cannot be directly extrapolated to the clinical situation, they provide experimental support to suggest that more attention should be paid to the potential risk of pharmacokinetic interactions in the presence of tamoxifen.
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Affiliation(s)
- D Poisson
- Laboratoire de Neuropharmacologie, Faculté de Pharmacie, Tours, France
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Vandel P, Bonin B, Bertschy G, Baumann P, Bouquet S, Vandel S, Sechter D, Bizouard P. Observations of the interaction between tricyclic antidepressants and fluvoxamine in poor metabolizers of dextromethorphan and mephenytoin. Therapie 1997; 52:74-6. [PMID: 9183927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Fauconneau B, Favrelière S, Pariat C, Génévrier A, Courtois P, Piriou A, Bouquet S. Nephrotoxicity of gentamicin and vancomycin given alone and in combination as determined by enzymuria and cortical antibiotic levels in rats. Ren Fail 1997; 19:15-22. [PMID: 9044448 DOI: 10.3109/08860229709026256] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The purpose of this study was to compare the nephrotoxicity of gentamicin and vancomycin alone and in combination. Thirty-two male Sprague-Dawley rats were randomized into 4 groups of 8 animals. Each group received 200mg/kg gentamicin (G) i.m., or 300 mg/kg vancomycin (V) i.v., or an association of 200 mg/kg gentamicin + 300 mg/kg vancomycin (i.m. and i.v., respectively), or 0.9% NaCl solution i.m. and i.v. (controls). To determine AAP, GGT, and NAG enzyme excretions, urine samples were taken over 24-h periods before and after the start of the experiment. A single renal cortical sample was obtained at necropsy for quantitation of antibiotic levels. No significant modifications of urinary excretions of creatinine and enzymuria were noted during the 24-h period before each drug administration or in controls. AAP, GGT, and NAG excretions were significantly increased after G and G + V injections (p < 0.001), whereas only AAP and GGT were statistically higher in rats receiving V (p < 0.05). NAG elimination (mean +/- SD) was higher in G + V (16.0 +/- 0.2 IU/mmol creatinine/24 h; p < 0.001) than g (8.8 +/- 0.6) or V (1.7 +/- 0.2). Surprisingly, mean vancomycin cortical levels decreased in the combination (827 +/- 131 vs. 1964 +/- 23 micrograms/g for V alone; p < 0.001), whereas gentamicin concentration was unchanged (826 +/- 66 vs. 839 +/- 28 micrograms/g for G alone). Determination of enzymuria allowed the nephrotoxicity of the antibiotics to be graded in the following order: vancomycin + gentamicin > gentamicin > vancomycin.
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Affiliation(s)
- B Fauconneau
- Institute of Xenobiotic Studies, Faculty of Medicine and Pharmacy Poitiers, France
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Lacoste L, Karayan J, Bouquet S, Rouffineau J, Péchier JM, Caritez JC, Carretier M, Fusciardi J. Pharmacokinetics of lidocaine with epinephrine in piglets following epidural anaesthesia. Lab Anim 1996; 30:228-33. [PMID: 8843047 DOI: 10.1258/002367796780684944] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The time course of arterial plasma lidocaine concentration, following an epidural anaesthesia via the sacrococcygeal or the S4-S5 trans-sacral approach, was studied in nine healthy piglets (7.8 +/- 1.3 weeks). Plasma lidocaine concentrations were measured for up to six hours after administration (5 mg/kg). Peak plasma concentration was 1.83 +/- 0.17 mg/l. Pharmacokinetic parameters determined from an independent compartment model were not different from those observed after an epidural administration of lidocaine via the sacrococcygeal space in children, except for a wide variability in the time taken to reach the maximum concentration (27.3 +/- 7.4 min) and a shorter half-life of elimination (82.8 +/- 7.0 min). The total body clearance of lidocaine was similar in piglets (17.3 +/- 1.6 ml/min/kg) to that in children. The shorter half-life of elimination was therefore attributed to a smaller volume of distribution in piglets (2.0 +/- 0.2 l/kg).
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Affiliation(s)
- L Lacoste
- Laboratory of Multivisceral Transplantation (GRTMV), INRA Le Magneraud, University of Poitiers School of Medicine, France
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DeLédinghen V, Ripault MP, Silvain C, Beauchant M, Raffoux N, Bouquet S. Subcutaneous octreotide for the prevention of early variceal rebleeding. Hepatology 1996; 23:938-40. [PMID: 8666354 DOI: 10.1002/hep.510230443] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Vandel S, Bertschy G, Baumann P, Bouquet S, Bonin B, Francois T, Sechter D, Bizouard P. Fluvoxamine and fluoxetine: interaction studies with amitriptyline, clomipramine and neuroleptics in phenotyped patients. Pharmacol Res 1995; 31:347-53. [PMID: 8685072 DOI: 10.1016/1043-6618(95)80088-3] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The in vivo pharmacokinetic interaction between two selective serotonin reuptake inhibitors (SSRI) (fluvoxamine, fluoxetine) and tricyclic antidepressants (TCAs) (amitriptyline, clomipramine) or neuroleptics (haloperidol, cyamemazine, levomepromazine, propericiazine) was assessed in 29 in-patients. They were phenotyped twice with dextromethorphan and mephenytoin: first in steady state conditions while under treatment with TCAs or neuroleptics; and also 10 days after an associated treatment with fluvoxamine (150 mg day(-1)) or fluoxetine (20 mg day(-1)). A clear and statistically significant increase in the mean urinary metabolic ratio (MR) of dextromethorphan/dextrorphan and in the mean mephenytoin S/R ratio (S/R) was seen with the fluvoxamine and fluoxetine treatment. The mean MR increased from 0.13 to 0.27 (P<0.01) with fluoxetine and from 0.34 to 0.84 with fluvoxamine (P<0.05). The (dextromethorphan) 'extensive metabolizer' phenotype switched to the 'poor metabolizer' phenotype in six patients by the 10-day fluoxetine treatment, and in two patients by the fluvoxamine treatment. The mean S/R increased from 0.24 to 0.34 (P<0.05) with fluoxetine, and from 0.33 to 0.58 (P<0.002) with fluvoxamine. These results are in agreement with the observed modification of TCA plasma levels after the SSRI association. During fluvoxamine treatment, amitriptyline and clomipramine plasma levels (P<0.06 both) tendentially increased, and those of demethylclomiprarnine decreased (P<0.06). Fluoxetine addition lead to a significant increase (P<0.02) of the desmethylclomipramine plasma levels. Fluvoxamine induced a moderate augmentation of the plasma levels of haloperidol and its reduced metabolite and no change in the plasma levels of cyamemazine and levomepromazine. But patients treated with neuroleptics are to few to draw any firm conclusion. This study suggests, that fluoxetine and fluvoxamine differ in their interaction with the metabolism of some other basic psychotropic drugs, by a mechanism which implies CYP2D6 and CYPmeph and possibly other isoformes of cytochrome P-450. Moreover, the interactions produced varied with the TCA prescribed.
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Affiliation(s)
- S Vandel
- Laboratoire de Pharmacologie Clinique, CHU, Besancon, France
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Lamard L, Pérault MC, Bouquet S, Guibert S. [Cytochrome p450 IID6, its role in psychopharmacology]. Ann Med Psychol (Paris) 1995; 153:140-3. [PMID: 7741408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Cytochrome P450 IID6 has got typical features (genetical polymorphism, competitive inhibition, saturability) which can be at the origin of pharmacokinetic modifications of molecules using it for their metabolism. In the field of pharmacology, many molecules are substrates or inhibitors of this cytochrome. They are presented. The results of a study of the dextromethorphan variation test performed before and after 28 days of clomipramine therapy with depressed patients are explained. They show a significant decreasing of the cytochrome P450 IID6 oxidation capacities between both of these times. A patient has passed from the phenotype "effective metabolizer" to the one of "poor metabolizer" with clomipramine.
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Le Pelley E, Klossek JM, Bouquet S, Ferrier B, Fusciardi J. [Cocaine contact anesthesia for endonasal surgery. Kinetics and clinical tolerance of a concentrated solution]. Ann Fr Anesth Reanim 1995; 14:472-7. [PMID: 8745970 DOI: 10.1016/s0750-7658(05)80487-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
OBJECTIVE To assess the pharmacokinetics and clinical tolerance of a 33% cocaine solution administered topically for intranasal surgery. STUDY DESIGN Clinical prospective open trial. PATIENTS AND METHODS Twelve ASA I patients scheduled for intranasal surgery were sedated with midazolam 2 mg and fentanyl 50 micrograms. Topical anaesthesia was obtained with aqueous 33% cocaine HCl 360 mg, lidocaine HCl 140 mg, adrenaline 0.04 mg and naphazoline 0.4 mg. Venous blood samples were taken before cocaine application and 15, 30, 45, 60, 90, 120, 150, 180, 240 min later. The plasma was immediately separated and the samples were frozen. The concentration of cocaine was measured by HPLC. Potential cardiotoxic and neurotoxic effects were clinically monitored. RESULTS The mean dose of cocaine applied was 5.85 +/- 1.3 mg.kg-1 and the dose actually delivered was 4 +/- 1.5 mg.kg-1. The Cmax was 859 +/- 503 ng.mL-1 after a Tmax to 47 +/- 17 min. The mean elimination half-life was 87 +/- 19 min (mean +/- SD). The total clearance and the volume of distribution were respectively 4,521 +/- 1,858 mL.min-1 and 568 +/- 273 L. No clinical evidence of toxicity was found. CONCLUSIONS This study shows that it is possible to perform major intranasal surgery under topical anaesthesia with a concentrated solution (33%) of cocaine at a high dose (6 mg.kg-1). These results differ completely with data obtained in addicts.
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Affiliation(s)
- E Le Pelley
- Département d'Anesthésie-Réanimation Chirurgicale, CHU la Milétrie, Poitiers
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Delon A, Favreliere S, Couet W, Courtois P, Bouquet S. Rapid and Sensitive Determination of Thalidomide in Human Plasma by High Performance Liquid Chromatography. ACTA ACUST UNITED AC 1995. [DOI: 10.1080/10826079508009240] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Carrie F, Roblot P, Bouquet S, Delon A, Roblot F, Becq-Giraudon B. Rifampin-induced nonresponsiveness of giant cell arteritis to prednisone treatment. Arch Intern Med 1994; 154:1521-4. [PMID: 8018008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Rifampin is an enzymatic inducer known to increase steroid metabolism. We studied two patients with giant cell arteritis in whom rifampin caused nonresponsiveness to prednisone treatment. A prednisone pharmacokinetics study was done. When rifampin-prednisone treatment must be used in giant cell arteritis, we propose increasing the prednisone dosage to 2 mg/kg per day.
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Affiliation(s)
- F Carrie
- Internal Medicine Service, University Hospital La Milétrie, Poitiers, France
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36
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Perault MC, Chapelle G, Bouquet S, Chevalier P, Montay G, Gaillot J, Chakroun H, Guillet P, Vandel B. Pharmacokinetic and pharmacodynamic study of suriclone imipramine interaction in man. Fundam Clin Pharmacol 1994; 8:251-5. [PMID: 7927120 DOI: 10.1111/j.1472-8206.1994.tb00806.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Suriclone is a novel cyclopyrrolone exhibiting anxiolytic activity. Twelve healthy Caucasian male volunteers participated in the study. A single dose of suriclone 0.4 mg, imipramine 75 mg, suriclone 0.4 mg + imipramine 75 mg, or placebo was given according to a 4 x 4 Latin-square design in order to assess the effect of drug association on pharmacokinetics and psychomotor performances. Visual analogue scale ratings, critical flicker frequency, choice visual reaction time, and Pauli, picture memory and Sternberg tests were performed before and 1.5, 6 and 9 h after drug administration. Suriclone, with the exception of the Pauli test, had no effect on psychomotor performances. The imipramine-suriclone association appeared to disturb some performances (no statistical significance), probably due to the effect of imipramine. Blood samples were collected for determination of imipramine and suriclone plasma levels respectively by high-performance liquid chromatography and radioimmunoassays. Suriclone AUC, Cmax and Tmax were not affected by imipramine, and reciprocally.
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Affiliation(s)
- M C Perault
- Service de Pharmacologie Clinique, CHU, Poitiers, France
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37
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Vandel S, Bertschy G, Bouquet S, Bonin B, Vittouris N. Fluoxetine and norfluoxetine plasma levels after treatment discontinuation in man. Therapie 1994; 49:141-2. [PMID: 7817338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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38
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Vandel S, Bertschy G, Perault MC, Sandoz M, Bouquet S, Chakroun R, Guibert S, Vandel B. Minor and clinically non-significant interaction between toloxatone and amitriptyline. Eur J Clin Pharmacol 1993; 44:97-9. [PMID: 8436164 DOI: 10.1007/bf00315289] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The possibility of a pharmacokinetic interaction between amitriptyline and toloxatone (a new MAOI-A) has been studied in 17 depressed in-patients. Amitriptyline and its demethylated and hydroxylated metabolites in blood and urine were measured at steady state after the administration of amitriptyline with and without toloxatone in steady state. The metabolic status of patients was determined using the dextromethorphan phenotyping test. There was only a minor pharmacokinetic interaction between amitriptyline (AMT) and toloxatone, with a small increase in the AMT/NT (nortriptyline) plasma ratio: 0.68 before and 0.78 after toloxatone. The urinary excretion and plasma levels of AMT and its metabolites were not affected by the co-therapy. Three of the patients were poor metabolisers, but this did not predict the magnitude of the drug interaction. The interaction does not justify plasma level monitoring of amitriptyline as the change in pharmacokinetics was so small.
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Affiliation(s)
- S Vandel
- Laboratoire de Pharmacologie Clinique, CHU de Besançon, France
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39
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Desbordes J, Bouquet S, Breux JP, Chapelle G, Bataille B, Giraudon BB, Fusciardi J. Comparative Penetration of 3 Fluoroquinolones into Human Cranial Bone Tissue after Administration of a Single Intravenous Dose. Drugs 1993. [DOI: 10.2165/00003495-199300453-00199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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40
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Fauconneau B, Pariat C, Bouquet S, Piriou A, Ingrand P, Courtois P. A comparative study of enzymuria, in the rat, of the drug combinations amikacin/vancomycin and amikacin/teicoplanin. Ren Fail 1993; 15:469-73. [PMID: 8105516 DOI: 10.3109/08860229309054961] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The aim of this study was to compare nephrotoxicity of the combinations amikacin/vancomycin and amikacin/teicoplanin. Eighteen male Wistar rats were divided into 3 groups of 6 animals each. The first group received 50 mg.kg-1 of amikacin (i.m. route) and 100 mg.kg-1 of vancomycin (i.p. route). The second group received 50 mg.kg-1 of amikacin (i.m. route) and 40 mg.kg-1 of teicoplanin (i.p. route). The third group received an isotonic solution of sodium chloride. The antibiotics were injected for a period of 6 days. Urine samples of animals were taken 24 h before the beginning of the experiment, then every day, throughout the duration of the treatment (6 days), continuing for an additional 3 days following completion of the administration of the drugs. There were no significant modifications in the urinary excretions of alanine aminopeptidase and the creatinine between the 3 groups; but in the group receiving amikacin/teicoplanin, we observed between days 3 and 8 an increase in the excretion of N-acetyl-beta-D- glucosaminidase when compared to the group receiving amikacin/vancomycin (p < or = 0.05) and to the control group (p < or = 0.01).
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Affiliation(s)
- B Fauconneau
- Institut d'Etudes des Xénobiotiques Poitiers, France
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41
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Bouquet S, Guyon S, Chapelle G, Perault MC, Barthes D. Sensitive Determination in Plasma of Imipramine and Desipramine by High Performance Liquid Chromatography Using Electrochemical Detection. ACTA ACUST UNITED AC 1992. [DOI: 10.1080/10826079208020873] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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42
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Abstract
The effect of time of administration on excretion of two brush border enzymes--alanine aminopeptidase (AAP) and gamma-glutamyl transferase (gamma GT), and a lysosomal enzyme, N-acetyl-beta-D-glucosaminidase (NAG) with a single high dose of vancomycin, gentamicin or a combination of vancomycin and gentamicin was studied in male Wistar rats and compared with elimination of a control group. The rats received vancomycin intraperitoneally (200 mg.kg-1), gentamicin intramuscularly (100 mg.kg-1) or the combination of the drugs by the same route. A control group received isotonic NaCl solution. The four groups of animals received a single injection at 8 a.m., 2 p.m., 8 p.m., and 2 a.m. and urine excretion values for AAP, gamma GT and NAG were determined 24 hr later. The results show that the nephrotoxicity of gentamicin + vancomycin is greater than that observed with gentamicin, which again is greater than that observed with vancomycin. Furthermore, circadian variations in renal toxicity were observed, the least occurring at 8 a.m.
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Affiliation(s)
- B Fauconneau
- Institute of Xenobiotic Studies, Faculty of Pharmacy, Poitiers, France
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43
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Bouquet S, Vandel S, Bertschy G, Bonin B, Vandel B, Sechter D, Bizouard P. Pharmacokinetics of fluoxetine and fluvoxamine in depressed patients: personal results. Clin Neuropharmacol 1992; 15 Suppl 1 Pt A:82A-83A. [PMID: 1499006 DOI: 10.1097/00002826-199201001-00044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- S Bouquet
- Laboratoire de Pharmacocinétique et Pharmacologie Clinique, CHU, Poitiers
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44
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Bertschy G, Vandel S, Francois T, Bonin B, Bouquet S, Baumann P, Volmat R, Sechter D, Bizouard P. Metabolic interaction between tricyclic antidepressant and fluvoxamine and fluoxetine, a pharmacogenetic approach. Clin Neuropharmacol 1992; 15 Suppl 1 Pt A:78A-79A. [PMID: 1499004 DOI: 10.1097/00002826-199201001-00042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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45
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Chapelle G, Bouquet S, Rivet G, Barrier L, Rochard E, Courtois P. Rapid Determination of Teicoplanin in Human Plasma by High Performance Liquid Chromatography. ACTA ACUST UNITED AC 1991. [DOI: 10.1080/01483919108049681] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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46
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Bouquet S, Chapelle G, Perault MC, Rochard E, Vandel B. [Drug interactions of cyclosporine. Literature review]. Therapie 1991; 46:155-62. [PMID: 2053094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The cyclosporine is widely used as an immuno-suppressive agent in association with others drugs. Its narrow therapeutic range requires frequent monitoring. We suggest a literature review of suspected or confirmed drug interactions. The classification is presented as: absorption interactions; pharmacokinetic interactions in antiinfectious, anticonvulsants, cardiovascular drugs, H2 antagonists agents, hormonotherapy; pharmacodynamic interactions associated to increased cyclosporine nephrotoxicity.
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Affiliation(s)
- S Bouquet
- Laboratoire de Pharmacocinétique, CHRU la Milétrie, Poitiers
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48
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Perault MC, Bouquet S, Bertschy G, Vandel S, Chakroun R, Guibert S, Vandel B. Debrisoquine and dextromethorphan phenotyping and antidepressant treatment. Therapie 1991; 46:1-3. [PMID: 2020918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The correlation between debrisoquine and dextromethorphan oxidation polymorphism was studied in 16 depressed in-patients. There was a close correlation between both phenotypes (r = 0.81 p less than 0.0017). During a treatment with amitriptyline during two weeks there was no significant modification of the dextromethorphan polymorphism. In the same way, the association of amitriptyline and toloxatone during two other weeks did not change this polymorphism in a significant way, even if there was a non significant shift towards higher values of the dextromethorphan metabolic ratio.
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Affiliation(s)
- M C Perault
- Service de Pharmacologie Clinique, CHRU, Poitiers
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49
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Perault MC, Griesemann E, Bouquet S, Lavoisy J, Vandel B. A study of the interaction of viloxazine with theophylline. Ther Drug Monit 1989; 11:520-2. [PMID: 2815226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The effect of viloxazine on the pharmacokinetics of theophylline was studied in eight healthy volunteers. Theophylline 200 mg/day (théophylline Bruneau 100 mg tablets) was administered on day 1; after a 3-day washout period, viloxazine 300 mg/day (Vivalan 100 mg tablets) was administered orally from days 5 to 7. On day 8, theophylline 200 mg and viloxazine 100 mg were concomitantly administered. The pharmacokinetic parameters of theophylline alone and after coadministration of viloxazine were determined. Viloxazine significantly increased the plasma concentrations (p less than 0.01) and the area-under-the-curve values (p less than 0.01) of theophylline and decreased its body clearance (p less than 0.05). Our results suggest that the dosage of theophylline should be decreased and its plasma concentrations monitored when viloxazine is prescribed.
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Affiliation(s)
- M C Perault
- Service de Pharmacologie Clinique, Universitaire de Poitiers, France
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Bouquet S, Vandel B, Guibert S, Lavoisy J. [Clinical pharmacokinetics of viloxazine chlorhydrate. Practical implications]. Encephale 1989; 15:443-7. [PMID: 2686964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Pharmacokinetic data of an antidepressant agent: Apparent half-life (T1/2 elim), time of peak plasma concentration (Tmax), bioavailability, have a major contribution to determine optimal dosage in accordance with a low modification of steady-state levels. Viloxazine is a second generation antidepressant drug with a short apparent half-life (T1/2 elim: 2 to 5 h (3.4 h), which requires once a day 3 h i.v. infusion or three intakes of 100 mg oral standard formulation. The recent development of a new 300 mg slow-release form seems justified by a best compliance. Pharmacokinetic properties [Tmax = 3 to 9 h (5.2 h), T1/2 term = 6 to 7 h], suggest once a day dosage without risk of accumulation in chronic treatment. The relationships between plasma levels and the clinical improvement were not clear in literature. The recent therapeutic use of a 300 mg slow-release tablet has not permitted to change precedent findings.
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Affiliation(s)
- S Bouquet
- Laboratoire Pharmacocinétique, CHRU La Milétrie, Poitiers
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