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Lambert J, Petrovitch D, Himes KP, Freiermuth CE, Braun RS, Brown JL, Bischof JJ, Lyons MS, Punches BE, Littlefield AK, Kisor DF, Sprague JE. Association of genetic variants in CYP3A5, DRD2 and NK1R with opioid overdose. Chem Biol Interact 2024; 403:111242. [PMID: 39265714 DOI: 10.1016/j.cbi.2024.111242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 08/29/2024] [Accepted: 09/10/2024] [Indexed: 09/14/2024]
Abstract
In 2023, 3651 Ohioans died because of an opioid overdose. Of those opioid overdoses, 3579 (98%) of which were attributed to fentanyl. We evaluated the association between 180 candidate single nucleotide polymorphisms (SNPs) and self-reported, nonfatal opioid overdose history from a prospective sample of 1301 adult patients (≥18 years of age) seen in three urban emergency departments in Ohio. Candidate SNPs included 120 related to the dopamine reward pathway and 60 related to pharmacokinetics. Of the 821 patients who reported having been exposed to opioids in their lifetime, 95 (11.6%) also reported having experienced an opioid-related overdose. Logistic regression, adjusting for age and biologic sex, was used to characterize the association between each SNP and opioid overdose, correcting for multiple comparisons. Three SNPs, located in three different genes were associated with opioid overdose: increased odds with CYP3A5 (rs776746) and DRD2 (rs4436578), and decreased odds with NKIR (rs6715729). Homozygotic CYP3A5 (rs776746) had the highest adjusted odds ratio (OR) of 6.96 (95% CI [2.45, 29.23]) and homozygotic NK1R (rs6715729) had the lowest OR of 0.28 (95% CI [0.14, 0.54). Given that CYP3A5 (rs776746) has been associated with increased plasma concentrations of fentanyl, rs776746 could potentially be utilized as a prognostic risk indicator for the potential of an opioid overdose. NK1R regulates the expression of the neurokinin-1 receptor, a regulator of respiration and NK1R (rs6715729) represents a novel genetic marker for a decreased risk of opioid overdose risk.
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Affiliation(s)
- Joshua Lambert
- College of Nursing, University of Cincinnati, Cincinnati, OH, USA
| | - Dan Petrovitch
- Department of Psychological Sciences, Texas Tech University, Lubbock, TX, USA
| | - Katie P Himes
- Department of Psychological Sciences, Texas Tech University, Lubbock, TX, USA
| | - Caroline E Freiermuth
- Department of Emergency Medicine, University of Cincinnati, Cincinnati, OH, USA; Center for Addiction Research, University of Cincinnati, Cincinnati, OH, USA
| | - Robert S Braun
- Department of Emergency Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Jennifer L Brown
- Department of Psychological Sciences, Purdue University, West Lafayette, IN, USA
| | - Jason J Bischof
- Department of Emergency Medicine, The Ohio State University, Columbus, OH, USA
| | - Michael S Lyons
- Department of Emergency Medicine, The Ohio State University, Columbus, OH, USA
| | - Brittany E Punches
- Department of Emergency Medicine, The Ohio State University, Columbus, OH, USA; College of Nursing, The Ohio State University, Columbus, OH, USA
| | | | - David F Kisor
- Department of Pharmaceutical Sciences and Pharmacogenomics, College of Pharmacy, Natural and Health Sciences, Manchester University, Fort Wayne, Indiana, USA
| | - Jon E Sprague
- The Ohio Attorney General's Center for the Future of Forensic Science, Bowling Green State University, Bowling Green, OH, USA.
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2
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Chalabianloo F, Fadnes LT, Johansson KA, Høiseth G, Vold JH, Kringen MK, Spigset O, Bramness JG. Methadone pharmacokinetics in opioid agonist treatment: Influencing factors and clinical implications. Basic Clin Pharmacol Toxicol 2024; 134:333-344. [PMID: 38124280 DOI: 10.1111/bcpt.13975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 11/27/2023] [Accepted: 12/15/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND A considerable inter-individual variability has been reported in the relationship between methadone doses applied and serum concentrations achieved in methadone maintenance treatment. However, the underlying causes for this variability are not fully understood. OBJECTIVES We investigated the influence of genetic, pathophysiological and pharmacological factors on serum methadone concentration-to-dose ratio (CDR) and discussed the clinical implications of the findings. METHODS We used data from two retrospective laboratory databases and a prospective cohort study to investigate the impact on methadone CDR of hepatic cytochrome P450 enzyme system (CYP) genetic polymorphisms, age, sex, concomitant medication, liver fibrosis and body mass index through linear mixed model analyses. FINDINGS A positive association was found between CDR and the homozygous CYP2B6*6 genotype, concurrent treatment with CYP3A4 inhibitors and body mass index. CDR was lower among women and during concomitant use of CYP inducers. CDR was not associated with age or the degree of liver fibrosis in our investigations. CONCLUSIONS This research work supports the need for individually tailored dosage considering the various factors that influence methadone CDR. The gained knowledge can contribute to reducing the risks associated with the treatment and optimizing the desired outcomes.
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Affiliation(s)
- Fatemeh Chalabianloo
- Department of Addiction Medicine, Haukeland University Hospital, Bergen, Norway
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Lars Thore Fadnes
- Department of Addiction Medicine, Haukeland University Hospital, Bergen, Norway
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Kjell Arne Johansson
- Department of Addiction Medicine, Haukeland University Hospital, Bergen, Norway
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Gudrun Høiseth
- Department of Forensic Medicine, Oslo University Hospital, Oslo, Norway
- Center for psychopharmacology, Diakonhjemmet Hospital, Oslo, Norway
- Norwegian Center for Addiction Research, University of Oslo, Oslo, Norway
| | - Jørn Henrik Vold
- Department of Addiction Medicine, Haukeland University Hospital, Bergen, Norway
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
- Division of Psychiatry, Haukeland University Hospital, Bergen, Norway
| | | | - Olav Spigset
- Department of Clinical Pharmacology, St. Olav University Hospital, Trondheim, Norway
- Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - Jørgen G Bramness
- Institute of Clinical Medicine, UiT - Norway's Arctic University, Tromsø, Norway
- Department of Alcohol, Tobacco and Drugs, Norwegian Institute of Public Health, Oslo, Norway
- Norwegian National Competency Centre for Dual Disorder, Innland Hospital Trust, Hamar, Norway
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3
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Freiermuth CE, Kisor DF, Lambert J, Braun R, Frey JA, Bachmann DJ, Bischof JJ, Lyons MS, Pantalon MV, Punches BE, Ancona R, Sprague JE. Genetic Variants Associated with Opioid Use Disorder. Clin Pharmacol Ther 2023; 113:1089-1095. [PMID: 36744646 DOI: 10.1002/cpt.2864] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 01/29/2023] [Indexed: 02/07/2023]
Abstract
Genetics are presumed to contribute 30-40% to opioid use disorder (OUD), allowing for the possibility that genetic markers could be used to identify personal risk for developing OUD. We aimed to test the potential association among 180 candidate single nucleotide polymorphisms (SNPs), 120 of which were related to the dopamine reward pathway and 60 related to pharmacokinetics. Participants were randomly recruited in 2020-2021 in a cross-sectional genetic association study. Self-reported health history including Diagnostic and Statistical Manual of Mental Disorders (DSM-5) OUD criteria and buccal swabs were collected. A total of 1,301 participants were included in the analyses for this study. Of included participants, 250 met the DSM-5 criteria for ever having OUD. Logistic regression, adjusting for age and biologic sex, was used to characterize the association between each SNP and DSM-5 criteria consistent with OUD. Six SNPs found in 4 genes were associated with OUD: increased odds with CYP3A5 (rs15524 and rs776746) and DRD3 (rs324029 and rs2654754), and decreased odds with CYP3A4 (rs2740574) and CYP1A2 (rs2069514). Homozygotic CYP3A5 (rs15524 and rs776746) had the highest adjusted odds ratio of 2.812 (95% confidence interval (CI) 1.737, 4.798) and 2.495 (95% CI 1.670, 3.835), respectively. Variants within the dopamine reward and opioid metabolism pathways have significant positive (DRD3 and CYP3A5) and negative (CYP3A4 and CYP1A2) associations with OUD. Identification of these variants provides promising possibilities for genetic prognostic and therapeutic targets for future investigation.
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Affiliation(s)
| | - David F Kisor
- Department of Pharmaceutical Sciences and Pharmacogenomics, College of Pharmacy, Natural and Health Sciences, Manchester University, Fort Wayne, Indiana, USA
| | - Joshua Lambert
- College of Nursing, University of Cincinnati, Cincinnati, Ohio, USA
| | - Robert Braun
- Department of Emergency Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Jennifer A Frey
- Department of Emergency Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Daniel J Bachmann
- Department of Emergency Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Jason J Bischof
- Department of Emergency Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Michael S Lyons
- Department of Emergency Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Michael V Pantalon
- Department of Emergency Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Brittany E Punches
- Department of Emergency Medicine, The Ohio State University, Columbus, Ohio, USA.,College of Nursing, The Ohio State University, Columbus, Ohio, USA
| | - Rachel Ancona
- Washington University School of Medicine, St. Louis, Missouri, USA
| | - Jon E Sprague
- The Ohio Attorney General's Center for the Future of Forensic Science, Bowling Green State University, Bowling Green, Ohio, USA
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4
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Chalabianloo F, Høiseth G, Vold JH, Johansson KA, Kringen MK, Dalgard O, Ohldieck C, Druckrey-Fiskaaen KT, Aas C, Løberg EM, Bramness JG, Fadnes LT. Impact of liver fibrosis and clinical characteristics on dose-adjusted serum methadone concentrations. J Addict Dis 2023; 41:53-63. [PMID: 35356868 DOI: 10.1080/10550887.2022.2057140] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
BACKGROUND There is limited knowledge on the causes of large variations in serum methadone concentrations and dose requirements. OBJECTIVES We investigated the impact of the degree of liver fibrosis on dose-adjusted steady-state serum methadone concentrations. METHODS We assessed the clinical and laboratory data of 155 Norwegian patients with opioid use disorder undergoing methadone maintenance treatment in outpatient clinics in the period 2016-2020. A possible association between the degree of liver fibrosis and dose-adjusted serum methadone concentration was explored using a linear mixed-model analysis. RESULTS When adjusted for age, gender, body mass index, and genotypes of CYP2B6 and CYP3A5, the concentration-to-dose ratio of methadone did not increase among the participants with liver fibrosis (Coefficient: 0.70; 95% CI: -2.16, 3.57; P: 0.631), even among those with advanced cirrhosis (-0.50; -4.59, 3.59; 0.810). CONCLUSIONS Although no correlation was found between the degree of liver stiffness and dose-adjusted serum methadone concentration, close clinical monitoring should be considered, especially among patients with advanced cirrhosis. Still, serum methadone measurements can be considered a supplement to clinical assessments, taking into account intra-individual variations.
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Affiliation(s)
- Fatemeh Chalabianloo
- Department of Addiction Medicine, Haukeland University Hospital, Bergen, Norway.,Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Gudrun Høiseth
- Department of Forensic Medicine, Oslo University Hospital, Oslo, Norway.,Center for psychopharmacology, Diakonhjemmet Hospital, Oslo, Norway.,Norwegian Center for Addiction Research, University of Oslo, Oslo, Norway
| | - Jørn Henrik Vold
- Department of Addiction Medicine, Haukeland University Hospital, Bergen, Norway.,Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway.,Division of Psychiatry, Haukeland University Hospital, Bergen, Norway
| | - Kjell Arne Johansson
- Department of Addiction Medicine, Haukeland University Hospital, Bergen, Norway.,Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | | | - Olav Dalgard
- Infectious Disease Department, Akershus University Hospital, Akerhus, Norway.,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Christian Ohldieck
- Department of Addiction Medicine, Haukeland University Hospital, Bergen, Norway
| | - Karl Trygve Druckrey-Fiskaaen
- Department of Addiction Medicine, Haukeland University Hospital, Bergen, Norway.,Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Christer Aas
- Department of Addiction Medicine, Haukeland University Hospital, Bergen, Norway.,Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Else-Marie Løberg
- Department of Addiction Medicine, Haukeland University Hospital, Bergen, Norway.,Division of Psychiatry, Haukeland University Hospital, Bergen, Norway.,NORMENT Centre of Excellence, Haukeland University Hospital, Bergen, Norway.,Faculty of Psychology, Department of Clinical Psychology, University of Bergen, Bergen, Norway
| | - Jørgen G Bramness
- Institute of Clinical Medicine, UiT - Norway's Arctic University, Tromsø, Norway.,Department of Alcohol, Tobacco and Drugs, Norwegian Institute of Public Health, Oslo, Norway
| | - Lars Thore Fadnes
- Department of Addiction Medicine, Haukeland University Hospital, Bergen, Norway.,Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
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5
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Di Mizio G, Marcianò G, Palleria C, Muraca L, Rania V, Roberti R, Spaziano G, Piscopo A, Ciconte V, Di Nunno N, Esposito M, Viola P, Pisani D, De Sarro G, Raffi M, Piras A, Chiarella G, Gallelli L. Drug-Drug Interactions in Vestibular Diseases, Clinical Problems, and Medico-Legal Implications. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:12936. [PMID: 34948545 PMCID: PMC8701970 DOI: 10.3390/ijerph182412936] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 11/28/2021] [Accepted: 12/03/2021] [Indexed: 12/23/2022]
Abstract
Peripheral vestibular disease can be treated with several approaches (e.g., maneuvers, surgery, or medical approach). Comorbidity is common in elderly patients, so polytherapy is used, but it can generate the development of drug-drug interactions (DDIs) that play a role in both adverse drug reactions and reduced adherence. For this reason, they need a complex kind of approach, considering all their individual characteristics. Physicians must be able to prescribe and deprescribe drugs based on a solid knowledge of pharmacokinetics, pharmacodynamics, and clinical indications. Moreover, full information is required to reach a real therapeutic alliance, to improve the safety of care and reduce possible malpractice claims related to drug-drug interactions. In this review, using PubMed, Embase, and Cochrane library, we searched articles published until 30 August 2021, and described both pharmacokinetic and pharmacodynamic DDIs in patients with vestibular disorders, focusing the interest on their clinical implications and on risk management strategies.
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Affiliation(s)
- Giulio Di Mizio
- Department of Law, Magna Graecia University of Catanzaro, 88100 Catanzaro, Italy
| | - Gianmarco Marcianò
- Department of Health Science, School of Medicine, University of Catanzaro, Clinical Pharmacology and Pharmacovigilance Unit, Mater Domini Hospital, 88100 Catanzaro, Italy
| | - Caterina Palleria
- Department of Health Science, School of Medicine, University of Catanzaro, Clinical Pharmacology and Pharmacovigilance Unit, Mater Domini Hospital, 88100 Catanzaro, Italy
| | - Lucia Muraca
- Department of Health Science, School of Medicine, University of Catanzaro, Clinical Pharmacology and Pharmacovigilance Unit, Mater Domini Hospital, 88100 Catanzaro, Italy
- Department of Primary Care, ASP 7, 88100 Catanzaro, Italy
| | - Vincenzo Rania
- Department of Health Science, School of Medicine, University of Catanzaro, Clinical Pharmacology and Pharmacovigilance Unit, Mater Domini Hospital, 88100 Catanzaro, Italy
| | - Roberta Roberti
- Department of Health Science, School of Medicine, University of Catanzaro, Clinical Pharmacology and Pharmacovigilance Unit, Mater Domini Hospital, 88100 Catanzaro, Italy
| | - Giuseppe Spaziano
- Department of Experimental Medicine L. Donatelli, Section of Pharmacology, School of Medicine, University of Campania Luigi Vanvitelli, 80123 Naples, Italy
| | - Amalia Piscopo
- Department of Law, Magna Graecia University of Catanzaro, 88100 Catanzaro, Italy
| | - Valeria Ciconte
- Department of Law, Magna Graecia University of Catanzaro, 88100 Catanzaro, Italy
- Department of Health Science, School of Medicine, University of Catanzaro, Clinical Pharmacology and Pharmacovigilance Unit, Mater Domini Hospital, 88100 Catanzaro, Italy
| | - Nunzio Di Nunno
- Department of History, Society and Studies on Humanity, University of Salento, 83100 Lecce, Italy
| | - Massimiliano Esposito
- Department of Medical, Surgical Sciences and Advanced Technologies "G. F. Ingrassia", University of Catania, 95121 Catania, Italy
| | - Pasquale Viola
- Unit of Audiology, Department of Experimental and Clinical Medicine, Regional Centre of Cochlear Implants and ENT Diseases, Magna Graecia University, 88100 Catanzaro, Italy
| | - Davide Pisani
- Unit of Audiology, Department of Experimental and Clinical Medicine, Regional Centre of Cochlear Implants and ENT Diseases, Magna Graecia University, 88100 Catanzaro, Italy
| | - Giovambattista De Sarro
- Department of Health Science, School of Medicine, University of Catanzaro, Clinical Pharmacology and Pharmacovigilance Unit, Mater Domini Hospital, 88100 Catanzaro, Italy
- Research Center FAS@UMG, Department of Health Science, University of Catanzaro, 88100 Catanzaro, Italy
| | - Milena Raffi
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40126 Bologna, Italy
| | - Alessandro Piras
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40126 Bologna, Italy
| | - Giuseppe Chiarella
- Unit of Audiology, Department of Experimental and Clinical Medicine, Regional Centre of Cochlear Implants and ENT Diseases, Magna Graecia University, 88100 Catanzaro, Italy
| | - Luca Gallelli
- Department of Health Science, School of Medicine, University of Catanzaro, Clinical Pharmacology and Pharmacovigilance Unit, Mater Domini Hospital, 88100 Catanzaro, Italy
- Research Center FAS@UMG, Department of Health Science, University of Catanzaro, 88100 Catanzaro, Italy
- Medifarmagen SRL, University of Catanzaro, 88100 Catanzaro, Italy
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6
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Methadone serum concentrations and influencing factors: A naturalistic observational study. Psychopharmacology (Berl) 2019; 236:3159-3167. [PMID: 31139877 DOI: 10.1007/s00213-019-05277-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 05/10/2019] [Indexed: 02/05/2023]
Abstract
RATIONALE Although methadone maintenance treatment (MMT) has long been used for opioid addiction, our knowledge on its pharmacokinetics is still limited. OBJECTIVES We aimed to investigate effects of age, gender, and various co-medications on methadone serum concentration-to-dose ratio (CDR) in a naturalistic setting. METHODS In total, 4425 routine serum methadone concentrations obtained from 1691 MMT patients in the period October 1999 to July 2017 were included. Information about doses, age, gender, and concurrent medications was available in the laboratory database at the Department of Clinical Pharmacology at St. Olav University Hospital in Trondheim, Norway. A log-linear mixed model was used when analyzing the data. RESULTS Mean age was 38.4 (range, 21-78) years and 70% were men. Mean CDR was 332 (range, 7-1776) (ng/mL)/(100 mg/d). Concomitant medication with at least one out of totally 170 drugs was recorded in 26% of the samples. CDRs were significantly lower in women (- 9%; confidence interval (CI), - 13%, - 4%; p = 0.001) and with concurrent use of CYP inducers (- 36%; CI, - 44%, - 28%; p < 0.001), but higher using CYP3A4 inhibitors as co-medications (+ 36%; CI, + 10%, + 68%; p = 0.005). CONCLUSIONS Our results warrant taking into consideration gender differences in methadone metabolism as well as the impact of potential drug-drug interactions to obtain an optimal therapeutic effect and avoid adverse effects in MMT. Although the clinical implications of the altered drug levels require further study, our results call for close clinical monitoring of all patients undergoing MMT, preferably along with laboratory measurements of methadone serum concentrations.
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Combined Effect of CYP2B6 Genotype and Other Candidate Genes on a Steady-State Serum Concentration of Methadone in Opioid Maintenance Treatment. Ther Drug Monit 2018; 39:550-555. [PMID: 28723731 DOI: 10.1097/ftd.0000000000000437] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND A considerable interindividual variability in methadone pharmacokinetics is seen in patients on methadone maintenance treatment. The aim of this study was to clarify the impact of the reduced function CYP2B6*6 variant allele together with variants in other candidate genes on a steady-state methadone concentration in a naturalistic setting. METHODS Information of methadone serum concentration, dose, age, sex, and CYP2C9, CYP2C19, and CYP2D6 genotypes were collected from a routine therapeutic drug monitoring database, whereas variant alleles in CYP2B6 and CYP3A5 were retrospectively genotyped. Linear mixed model analyses were used to study the impact of gene variants on methadone serum concentration/dose (C/D) ratios, including age, sex, and time since the last dose intake as covariates. RESULTS Overall, 155 serum samples from 62 patients were included in this study. The estimated mean methadone C/D ratios was 17.8 nmol·L·mg for homozygous carriers of CYP2B6*6, which was significantly (P < 0.001) higher than noncarriers (9.2 nmol·L·mg). There was no difference in C/D ratios between heterozygous carriers of CYP2B6*6 (9.1 nmol·L·mg) and noncarriers. An increase in mean methadone C/D ratios was also seen for homozygous carriers of CYP3A5*3 and heterozygous carriers of CYP2C9*2 or *3 and CYP2C19*2 or *3. CONCLUSIONS Patients homozygous for CYP2B6*6 had a >90% higher methadone C/D ratio. Genotyping of CYP2B6 may therefore be of value when assessing dose requirements in methadone maintenance treatment.
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8
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Ahmad T, Valentovic MA, Rankin GO. Effects of cytochrome P450 single nucleotide polymorphisms on methadone metabolism and pharmacodynamics. Biochem Pharmacol 2018; 153:196-204. [PMID: 29458047 DOI: 10.1016/j.bcp.2018.02.020] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 02/14/2018] [Indexed: 01/11/2023]
Abstract
Methadone is a synthetic, long-acting opioid with a single chiral center forming two enantiomers, (R)-methadone and (S)-methadone, each having specific pharmacological actions. Concentrations of (R)- and (S)-methadone above therapeutic levels have the ability to cause serious, life-threatening, and fatal side effects. This toxicity can be due in part to the pharmacogenetics of an individual, which influences the pharmacokinetic and pharmacodynamic properties of the drug. Methadone is primarily metabolized in the liver by cytochrome P450 (CYP) enzymes, predominately by CYP2B6, followed by CYP3A4, 2C19, 2D6, and to a lesser extent, CYP2C18, 3A7, 2C8, 2C9, 3A5, and 1A2. Single nucleotide polymorphisms (SNPs) located within CYPs have the potential to play an important role in altering methadone metabolism and pharmacodynamics. Several SNPs in the CYP2B6, 3A4, 2C19, 2D6, and 3A5 genes result in increases in methadone plasma concentrations, decreased N-demethylation, and decreased methadone clearance. In particular, carriers of CYP2B6*6/*6 may have a greater risk for detrimental adverse effects, as methadone metabolism and clearance are diminished in these individuals. CYP2B6*4, on the other hand, has been observed to decrease plasma concentrations of methadone due to increased methadone clearance. The involvement, contribution, and understanding the role of SNPs in CYP2B6, and other CYP genes, in methadone metabolism can improve the therapeutic uses of methadone in patient outcome and the development of personalized medicine.
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Affiliation(s)
- Taha Ahmad
- Department of Biomedical Sciences, Toxicology Research Cluster, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755-9310, USA
| | - Monica A Valentovic
- Department of Biomedical Sciences, Toxicology Research Cluster, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755-9310, USA
| | - Gary O Rankin
- Department of Biomedical Sciences, Toxicology Research Cluster, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755-9310, USA.
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9
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Individual variability in clinical effect and tolerability of opioid analgesics – Importance of drug interactions and pharmacogenetics. Scand J Pain 2017; 17:193-200. [DOI: 10.1016/j.sjpain.2017.09.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 09/11/2017] [Accepted: 09/12/2017] [Indexed: 11/23/2022]
Abstract
Abstract
Background
As pain is often a comorbid condition, many patients use opioid analgesics in combination with several other drugs. This implies a generally increased risk of drug interactions, which along with inherent pharmacogenetic variability and other factors may cause differences in therapeutic response of opioids.
Aim
To provide an overview of interactions and pharmacogenetic variability of relevance for individual differences in effect and tolerability of opioid analgesics, which physicians and other healthcare professionals should be aware of in clinical practice.
Methods
The article was based on unsystematic searches in PubMed to identify literature highlighting the clinical impact of drug interactions and pharmacogenetics as sources of variable response of opioid analgesics.
Results
Cytochrome P450 (CYP)-mediated metabolism is an important process for both clinically relevant interactions and pharmacogenetic variability of several opioids. Concomitant use of CYP inhibitors (e.g. paroxetine, fluoxetine and bupropion) or inducers (e.g. carbamazepine, phenobarbital and phenytoin) could counteract the clinical effect or trigger side effects of analgesics in the same manner as genetically determined differences in CYP2D6-mediated metabolism of many opioids. Moreover, combination treatment with drugs that inhibit or induce P-glycoprotein (ABCB1), a blood-brain barrier efflux transporter, may alter the amount (‘dose’) of opioids distributed to the brain. At the pharmacodynamic level, it is crucial to be aware of the potential risk of interaction causing serotonergic syndrome when combining opioids and serotonergic drugs, in particular antidepressants inhibiting serotonin reuptake (SSRIs and SNRIs). Regarding pharmacogenetics at the receptor level of pain treatment, the knowledge is currently scarce, but an allelic variant of the μ1 opioid receptor (OPRM1) gene has been associated with higher dosage requirement to achieve analgesia.
Conclusions and implications
Drug interactions and pharmacogenetic differences may lead to therapeutic failure or serious side effects of opioid analgesics. Many interactions involve combinations with antidepressants and antiepileptics, which are highly relevant drugs in patients suffering from pain. To prevent unfavourable drug interactions it is important that clinicians pay close attention and use electronic drug interaction checkers when treatments are initiated or discontinued. For the management of issues related to pharmacogenetic differences, blood-based CYP genotyping is available as routine test at many laboratories, and provide a valuable tool for proper choice of drugs and doses for treatment of pain and other diseases.
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10
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Christoffersen DJ, Damkier P, Feddersen S, Möller S, Thomsen JL, Brasch-Andersen C, Brøsen K. TheABCB1, rs9282564,AGandTTGenotypes and theCOMT,rs4680,AAGenotype are Less Frequent in Deceased Patients with Opioid Addiction than in Living Patients with Opioid Addiction. Basic Clin Pharmacol Toxicol 2016; 119:381-8. [DOI: 10.1111/bcpt.12602] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 04/05/2016] [Indexed: 01/16/2023]
Affiliation(s)
| | - Per Damkier
- Department of Public Health; Clinical Pharmacology; University of Southern Denmark; Odense Denmark
- Department of Clinical Chemistry & Pharmacology; Odense University Hospital; Odense C Denmark
| | - Søren Feddersen
- Department of Clinical Chemistry & Pharmacology; Odense University Hospital; Odense C Denmark
| | - Sören Möller
- OPEN - Odense Patient data Explorative Network; Odense University Hospital and Department of Clinical Research; University of Southern Denmark; Odense C Denmark
| | - Jørgen L. Thomsen
- Institute of Forensic Medicine; University of Southern Denmark; Odense C Denmark
| | | | - Kim Brøsen
- Department of Public Health; Clinical Pharmacology; University of Southern Denmark; Odense Denmark
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11
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Strømmen M, Helland A, Kulseng B, Spigset O. Bioavailability of Methadone After Sleeve Gastrectomy: A Planned Case Observation. Clin Ther 2016; 38:1532-1536. [PMID: 27181614 DOI: 10.1016/j.clinthera.2016.04.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2016] [Revised: 04/11/2016] [Accepted: 04/19/2016] [Indexed: 12/21/2022]
Abstract
OBJECTIVE Morbidly obese patients on opioid-replacement therapy may be at risk for treatment refusal with regard to bariatric surgery. However, patients on opioid replacement may have the personal skills to facilitate the lifestyle changes required for successful outcomes after bariatric surgery. This planned case observation assessed the effects of sleeve gastrectomy on the pharmacokinetic properties of methadone. METHODS A white woman in her 40s on methadone maintenance therapy and with morbid obesity was referred for bariatric surgery. Serial blood samples for methadone concentration measurements were obtained before and at 5 days and 1, 7, and 11 months after surgery. FINDINGS Serum methadone concentrations increased from before to 5 days after surgery and continued to increase for 7 months thereafter. The predose measurement at 11 months postoperatively suggests a further increase compared with the previous predose measurements. IMPLICATIONS Clinicians should beware the potential for altered effects of methadone after bariatric surgery. We recommend that serum concentrations be routinely measured pre- and postoperatively, and that the dose be adjusted according to these measurements and regular clinical assessments.
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Affiliation(s)
- Magnus Strømmen
- Centre for Obesity Research, Clinic of Surgery, St. Olav University Hospital, Trondheim, Norway; Department of Neuroscience, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.
| | - Arne Helland
- Department of Clinical Pharmacology, Clinic of Laboratory Medicine, St. Olav University Hospital, Trondheim, Norway; Department of Laboratory Medicine, Children's and Women's Health, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
| | - Bård Kulseng
- Centre for Obesity Research, Clinic of Surgery, St. Olav University Hospital, Trondheim, Norway
| | - Olav Spigset
- Department of Clinical Pharmacology, Clinic of Laboratory Medicine, St. Olav University Hospital, Trondheim, Norway; Department of Laboratory Medicine, Children's and Women's Health, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
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12
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Somogyi AA, Barratt DT, Ali RL, Coller JK. Pharmacogenomics of methadone maintenance treatment. Pharmacogenomics 2014; 15:1007-27. [DOI: 10.2217/pgs.14.56] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Methadone is the major opioid substitution therapy for opioid dependence. Dosage is highly variable and is often controlled by the patient and prescriber according to local and national policy and guidelines. Nevertheless many genetic factors have been investigated including those affecting its metabolism (CYP2B6-consistent results), efflux transport (P-gp-inconsistent results), target μ-opioid receptor (μ-opioid receptor-inconsistent results) and a host of other receptors (DRD2) and signaling elements (GIRK2 and ARRB2; not replicated). None by themselves have been able to substantially explain dosage variation (the major but not sole end point). When multiple genes have been combined such as ABCB1, CYP2B6, OPRM1 and DRD2 a greater contribution to dosage variation was found but not as yet replicated. As stabilization of dosage needs to be made rapidly, it is imperative that larger internationally based studies be instigated so that genetic contribution to dosage can be properly assessed, which may or may not tailor to different ethnic groups and each country’s policy towards an outcome that benefits all.
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Affiliation(s)
- Andrew A Somogyi
- Discipline of Pharmacology, School of Medical Sciences, Faculty of Health Sciences, University of Adelaide, Adelaide 5005, Australia
- Department of Clinical Pharmacology, Royal Adelaide Hospital, Adelaide, 5005, Australia
| | - Daniel T Barratt
- Discipline of Pharmacology, School of Medical Sciences, Faculty of Health Sciences, University of Adelaide, Adelaide 5005, Australia
| | - Robert L Ali
- Discipline of Pharmacology, School of Medical Sciences, Faculty of Health Sciences, University of Adelaide, Adelaide 5005, Australia
- DASSA World Health Organization Collaborating Centre for Research in the Treatment of Drug & Alcohol Problems, School of Medical Sciences, Faculty of Health Sciences, University of Adelaide, Adelaide 5005, Australia
| | - Janet K Coller
- Discipline of Pharmacology, School of Medical Sciences, Faculty of Health Sciences, University of Adelaide, Adelaide 5005, Australia
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13
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Gallelli L, Palleria C, De Vuono A, Mumoli L, Vasapollo P, Piro B, Russo E. Safety and efficacy of generic drugs with respect to brand formulation. J Pharmacol Pharmacother 2013; 4:S110-4. [PMID: 24347975 PMCID: PMC3853662 DOI: 10.4103/0976-500x.120972] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Generic drugs are equivalent to the brand formulation if they have the same active substance, the same pharmaceutical form and the same therapeutic indications and a similar bioequivalence respect to the reference medicinal product. The use of generic drugs is indicated from many countries in order to reduce medication price. However some points, such as bioequivalence and the role of excipients, may be clarified regarding the clinical efficacy and safety during the switch from brand to generic formulations. In conclusion, the use of generic drugs could be related with an increased days of disease (time to relapse) or might lead to a therapeutic failure; on the other hand, a higher drug concentration might expose patients to an increased risk of dose-dependent side-effects.
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Affiliation(s)
- Luca Gallelli
- Department of Health Science, Regional Center on drug information, Mater Domini University Hospital, Italy and Chair of Pharmacology, School of Medicine, University of Catanzaro, Italy
| | - Caterina Palleria
- Department of Health Science, Regional Center on drug information, Mater Domini University Hospital, Italy and Chair of Pharmacology, School of Medicine, University of Catanzaro, Italy
| | | | - Laura Mumoli
- Department of Health Science, Regional Center on drug information, Mater Domini University Hospital, Italy and Chair of Pharmacology, School of Medicine, University of Catanzaro, Italy
| | | | | | - Emilio Russo
- Department of Health Science, Regional Center on drug information, Mater Domini University Hospital, Italy and Chair of Pharmacology, School of Medicine, University of Catanzaro, Italy
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14
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De Vuono A, Scicchitano F, Palleria C, Russo E, De Sarro G, Gallelli L. Lack of efficacy during the switch from brand to generic allopurinol. J Forensic Leg Med 2013; 20:540-2. [PMID: 23756530 DOI: 10.1016/j.jflm.2013.02.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Revised: 01/03/2013] [Accepted: 02/05/2013] [Indexed: 01/17/2023]
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15
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Gallelli L, Avenoso T, Falcone D, Palleria C, Peltrone F, Esposito M, De Sarro G, Carotenuto M, Guidetti V. Effects of acetaminophen and ibuprofen in children with migraine receiving preventive treatment with magnesium. Headache 2013; 54:313-24. [PMID: 23808884 DOI: 10.1111/head.12162] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/24/2013] [Indexed: 01/22/2023]
Abstract
AIM The purpose of this study was to evaluate both the effects of ibuprofen and/or acetaminophen for the acute treatment of primary migraine in children in or out prophylactic treatment with magnesium. METHODS Children ranging from the ages of 5 to 16 years with at least 4 attack/month of primary migraine were eligible for participation the study. A visual analog scale was used to evaluate pain intensity at the moment of admission to the study (start of the study) and every month up to 18 months later (end of the study). RESULTS One hundred sixty children of both sexes aged 5-16 years were enrolled and assigned in 4 groups to receive a treatment with acetaminophen or ibuprofen without or with magnesium. Migraine pain endurance and monthly frequency were similar in the 4 groups. Both acetaminophen and ibuprofen induced a significant decrease in pain intensity (P < .01), without a time-dependent correlation, but did not modify its frequency. Magnesium pretreatment induced a significant decrease in pain intensity (P < .01) without a time-dependent correlation in both acetaminophen- and ibuprofen-treated children and also significantly reduced (P < .01) the pain relief timing during acetaminophen but not during ibuprofen treatment (P < .01). In both acetaminophen and ibuprofen groups, magnesium pretreatment significantly reduced the pain frequency (P < .01). CONCLUSIONS Magnesium increased the efficacy of ibuprofen and acetaminophen with not age-related effects.
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Affiliation(s)
- Luca Gallelli
- Department of Health Science, School of Medicine, University of Catanzaro, Catanzaro, Italy
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16
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Characteristics and Clinical Implications of the Pharmacokinetic Profile of Ibuprofen in Patients with Knee Osteoarthritis. Clin Drug Investig 2012; 32:827-33. [DOI: 10.1007/s40261-012-0011-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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17
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Kharasch ED, Bedynek PS, Hoffer C, Walker A, Whittington D. Lack of indinavir effects on methadone disposition despite inhibition of hepatic and intestinal cytochrome P4503A (CYP3A). Anesthesiology 2012; 116:432-47. [PMID: 22273859 PMCID: PMC3586934 DOI: 10.1097/aln.0b013e3182423478] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
BACKGROUND Methadone disposition and pharmacodynamics are highly susceptible to interactions with antiretroviral drugs. Methadone clearance and drug interactions have been attributed to cytochrome P4503A4 (CYP3A4), but actual mechanisms are unknown. Drug interactions can be clinically and mechanistically informative. This investigation assessed effects of the protease inhibitor indinavir on methadone pharmacokinetics and pharmacodynamics, hepatic and intestinal CYP3A4/5 activity (using alfentanil), and intestinal transporter activity (using fexofenadine). METHODS Twelve healthy volunteers underwent a sequential crossover. On three consecutive days they received oral alfentanil plus fexofenadine, intravenous alfentanil, and intravenous plus oral (deuterium-labeled) methadone. This was repeated after 2 weeks of indinavir. Plasma and urine analytes were measured by mass spectrometry. Opioid effects were measured by miosis. RESULTS Indinavir significantly inhibited hepatic and first-pass CYP3A activity. Intravenous alfentanil systemic clearance and hepatic extraction were reduced to 40-50% of control, apparent oral clearance to 30% of control, and intestinal extraction decreased by half, indicating 50% and 70% inhibition of hepatic and first-pass CYP3A activity. Indinavir increased fexofenadine area under the plasma concentration-time curve 3-fold, suggesting significant P-glycoprotein inhibition. Indinavir had no significant effects on methadone plasma concentrations, methadone N-demethylation, systemic or apparent oral clearance, renal clearance, hepatic extraction or clearance, or bioavailability. Methadone plasma concentration-effect relationships were unaffected by indinavir. CONCLUSIONS Despite significant inhibition of hepatic and intestinal CYP3A activity, indinavir had no effect on methadone N-demethylation and clearance, suggesting little or no role for CYP3A in clinical disposition of single-dose methadone. Inhibition of gastrointestinal transporter activity had no influence of methadone bioavailability.
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Affiliation(s)
- Evan D Kharasch
- Division of Clinical and Translational Research, Department of Anesthesiology, Washington University in St. Louis, St. Louis, Missouri 63110-1093, USA.
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18
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Gallelli L, Colosimo M, Tolotta GA, Falcone D, Luberto L, Curto LS, Rende P, Mazzei F, Marigliano NM, De Sarro G, Cucchiara S. Prospective randomized double-blind trial of racecadotril compared with loperamide in elderly people with gastroenteritis living in nursing homes. Eur J Clin Pharmacol 2010; 66:137-44. [PMID: 19902197 DOI: 10.1007/s00228-009-0751-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2009] [Accepted: 10/18/2009] [Indexed: 11/24/2022]
Abstract
AIM Our aim was to compare the efficacy and tolerability of loperamide and racecadotril in elderly patients with acute diarrhea. RESEARCH DESIGN AND METHODS We performed a randomized, prospective, double-blind, and parallel group design implemented in geriatric nursing homes in Catanzaro, Italy, from February 2008 to March 2009. Patients of both sexes were randomly allocated to receive either one tablet of racecadotril 100 mg every 8 h or two tablets of loperamide 2.0 mg followed by one tablet after each unformed stool, up to four tablets in any 24-h period. Patients were treated until recovery, defined as the production of two consecutive normal stools or no stool production for a period of 12 h. RESULTS Normal stools were collected 36 +/- 4 h after the beginning of racecadotril and in 63 +/- 6 h from the beginning of loperamide administration (P < 0.01). The median time of abdominal pain in the intent-to-treat (ITT) population was 14 h for racecadotril and 28 h for loperamide. In the per-protocol (PP) population, the median time of abdominal pain was 14 h for racecadotril and 32 h for loperamide (P < 0.01). About the 50% of patients experienced at least one adverse event during the study: 12% in the racecadotril group and 60% in the loperamide group. The most frequently occurring adverse events were nausea and constipation. Genetic analysis did not report the presence of rapid or poor metabolizers. Pharmacoeconomic analysis performed at the end of our study documented an increase in costs in the loperamide group with respect to the racecadotril group (P < 0.01). CONCLUSIONS Racecadotril is more effective than loperamide-probably due to drug interaction with loperamide-and it is not related to pharmacogenetic susceptibility. Racecadotril is also more cost effective than loperamide.
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Affiliation(s)
- Luca Gallelli
- School of Medicine and Surgery, Department of Experimental and Clinical Medicine, University Magna Graecia of Catanzaro, Mater Domini University Hospital, Catanzaro, Italy.
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Yuferov V, Levran O, Proudnikov D, Nielsen DA, Kreek MJ. Search for genetic markers and functional variants involved in the development of opiate and cocaine addiction and treatment. Ann N Y Acad Sci 2010; 1187:184-207. [PMID: 20201854 PMCID: PMC3769182 DOI: 10.1111/j.1749-6632.2009.05275.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Addiction to opiates and illicit use of psychostimulants is a chronic, relapsing brain disease that, if left untreated, can cause major medical, social, and economic problems. This article reviews recent progress in studies of association of gene variants with vulnerability to develop opiate and cocaine addictions, focusing primarily on genes of the opioid and monoaminergic systems. In addition, we provide the first evidence of a cis-acting polymorphism and a functional haplotype in the PDYN gene, of significantly higher DNA methylation rate of the OPRM1 gene in the lymphocytes of heroin addicts, and significant differences in genotype frequencies of three single-nucleotide polymorphisms of the P-glycoprotein gene (ABCB1) between "higher" and "lower" methadone doses in methadone-maintained patients. In genomewide and multigene association studies, we found association of several new genes and new variants of known genes with heroin addiction. Finally, we describe the development and application of a novel technique: molecular haplotyping for studies in genetics of drug addiction.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily B
- ATP Binding Cassette Transporter, Subfamily B, Member 1/genetics
- Catechol O-Methyltransferase/genetics
- Cocaine-Related Disorders/genetics
- Cocaine-Related Disorders/therapy
- Enkephalins/genetics
- Epigenesis, Genetic
- Genetic Markers
- Genetic Variation
- Genome-Wide Association Study
- Haplotypes
- Humans
- Methadone/metabolism
- Methadone/therapeutic use
- Opioid-Related Disorders/genetics
- Opioid-Related Disorders/therapy
- Pharmacogenetics
- Protein Precursors/genetics
- Receptor, Melanocortin, Type 2/genetics
- Receptor, Serotonin, 5-HT1B/genetics
- Receptors, Opioid, kappa/genetics
- Receptors, Opioid, mu/genetics
- Tryptophan Hydroxylase/genetics
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Affiliation(s)
- Vadim Yuferov
- The Laboratory of the Biology of Addictive Diseases, The Rockefeller University, New York, New York
| | - Orna Levran
- The Laboratory of the Biology of Addictive Diseases, The Rockefeller University, New York, New York
| | - Dmitri Proudnikov
- The Laboratory of the Biology of Addictive Diseases, The Rockefeller University, New York, New York
| | - David A. Nielsen
- The Laboratory of the Biology of Addictive Diseases, The Rockefeller University, New York, New York
| | - Mary Jeanne Kreek
- The Laboratory of the Biology of Addictive Diseases, The Rockefeller University, New York, New York
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20
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Batkis MF, Treisman GJ, Angelino AF. Integrated opioid use disorder and HIV treatment: rationale, clinical guidelines for addiction treatment, and review of interactions of antiretroviral agents and opioid agonist therapies. AIDS Patient Care STDS 2010; 24:15-22. [PMID: 20095910 DOI: 10.1089/apc.2009.0242] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Injection drug use (IDU) is an important vector of HIV infection in the United States. Many patients with HIV infection have comorbid substance use disorders. Integrated treatment for HIV and substance use disorders has been shown to improve HIV and other health outcomes, but significant barriers to integrated treatment exist. For individuals who are dependent on injection opioid drugs, agonist therapies of methadone or buprenorphine maintenance are available as part of a treatment program. Patients who are infected with HIV and require antiretroviral therapy (ART) are at risk for drug-drug interaction between ART and methadone or buprenorphine. We present a programmatic approach to the evaluation and treatment of opioid use disorders for HIV care providers, as well as a summary of the available knowledge of interactions of methadone and buprenorphine with ART, along with the level of evidence for each actual or potential interaction. Based on the available information of practice and the level of clinical significance of drug-drug interactions, we conclude that buprenorphine-based maintenance treatment for opioid dependent patients is the preferred maintenance therapy for integrated treatment systems.
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Affiliation(s)
- Marcelo F. Batkis
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Glenn J. Treisman
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Andrew F. Angelino
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland
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21
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‘False-positive’ and ‘false-negative’ test results in clinical urine drug testing. Bioanalysis 2009; 1:937-52. [DOI: 10.4155/bio.09.81] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The terms ‘false-positive’ and ‘false-negative’ are widely used in discussions of urine drug test (UDT) results. These terms are inadequate because they are used in different ways by physicians and laboratory professionals and they are too narrow to encompass the larger universe of potentially misleading, inappropriate and unexpected drug test results. This larger universe, while not solely comprised of technically ‘true’ or ‘false’ positive or negative test results, presents comparable interpretive challenges with corresponding clinical implications. In this review, we propose the terms ‘potentially inappropriate’ positive or negative test results in reference to UDT results that are ambiguous or unexpected and subject to misinterpretation. Causes of potentially inappropriate positive UDT results include in vivo metabolic conversions of a drug, exposure to nonillicit sources of a drug and laboratory error. Causes of potentially inappropriate negative UDT results include limited assay specificity, absence of drug in the urine, presence of drug in the urine, but below established assay cutoff, specimen manipulation and laboratory error. Clinical UDT interpretation is a complicated task requiring knowledge of recent prescription, over-the-counter and herbal drug administration, drug metabolism and analytical sensitivities and specificities.
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