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Uslu O, Osman Ay K, Dikmen G. Synthesis of silver nanowires and their utilization as a SERS substrate for the detection of Lidocaine. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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2
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Ou YH, Ou YH, Gu J, Kang L. Personalized anesthetic patches for dental applications. Int J Bioprint 2019; 5:203. [PMID: 32596543 PMCID: PMC7310263 DOI: 10.18063/ijb.v5i2.1.203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 04/27/2019] [Indexed: 12/22/2022] Open
Abstract
Topical anesthetics are widely used in dental procedures. However, most commercially available medications are in the form of liquid or semisolid, which cannot provide prolonged effect intraorally. To address this issue, we proposed the use of three-dimensional printing (3DP) to fabricate a customizable dental anesthetic patch loaded with lidocaine that can be fitted perfectly onto the affected tooth. It has been shown that that patch can adhere on the tooth for more than 1 h, while releasing lidocaine from the patch made of hydrogels. In addition, the results illustrated the possibility of controlling the drug release profile by altering the shape of the patch, as well the use of a 3DP tooth model as the drug testing platform. Taken together, these data further reinforce the vast potential of the application of 3DP technology in personalized medicine.
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Affiliation(s)
- Yi-Hsuan Ou
- Department of Pharmacy, National University of Singapore, Singapore, Republic of Singapore
| | - Yi-Hui Ou
- Department of Pharmacy, National University of Singapore, Singapore, Republic of Singapore
| | - Jing Gu
- Department of Dentistry, Sixth Medical Centre of PLA General Hospital, Beijing, China
| | - Lifeng Kang
- School of Pharmacy, University of Sydney, Australia
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3
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Plotycya S, Dubenska L, Blazheyevskiy M, Pysarevska S, Sarahman O. Determination of Local Anesthetics of Amide Group in Pharmaceutical Preparations by Cyclic Voltammetry. ELECTROANAL 2016. [DOI: 10.1002/elan.201600134] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Serhij Plotycya
- Ivan Franko National University of L'viv, Department of Analytical Chemistry; 79005 Kyryla i Mephodia Str. 8 L'viv Ukraine
| | - Liliya Dubenska
- Ivan Franko National University of L'viv, Department of Analytical Chemistry; 79005 Kyryla i Mephodia Str. 8 L'viv Ukraine
| | - Mykola Blazheyevskiy
- National Pharmaceutical University; Department of Physical and Colloid Chemistry; 61168 Bljuhera Str. 4 Kharkiv Ukraine
| | - Solomiya Pysarevska
- Ivan Franko National University of L'viv; Department of Life Safety; 79000 Doroshenka Str. 41 L'viv Ukraine
| | - Olha Sarahman
- Ivan Franko National University of L'viv, Department of Analytical Chemistry; 79005 Kyryla i Mephodia Str. 8 L'viv Ukraine
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Kochhar JS, Quek TC, Soon WJ, Choi J, Zou S, Kang L. Effect of Microneedle Geometry and Supporting Substrate on Microneedle Array Penetration into Skin. J Pharm Sci 2013; 102:4100-8. [DOI: 10.1002/jps.23724] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 08/09/2013] [Accepted: 08/15/2013] [Indexed: 11/08/2022]
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5
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Kochhar JS, Lim WXS, Zou S, Foo WY, Pan J, Kang L. Microneedle integrated transdermal patch for fast onset and sustained delivery of lidocaine. Mol Pharm 2013; 10:4272-80. [PMID: 24044683 DOI: 10.1021/mp400359w] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Lidocaine as an analgesic is of particular interest in both acute and chronic pain conditions and is used via injections or transdermal patches. While injections are associated with problems such as patient incompliance, topical administration of lidocaine using patches is less efficient due to variability of drug absorption among individuals, slower drug permeation through the skin, and hence a resultant undesirable delay in analgesic effects. To address this clinical problem, we developed a microneedle integrated transdermal patch (MITP), using a photolithography based process, in which microneedles create micrometer-sized channels in the skin to deliver lidocaine rapidly, while the reservoir patch holding the bulk of the drug enables higher drug loading and carries on to release the drug for prolonged periods. We demonstrated a new approach of drug delivery using microneedles, where drugs diffuse out of microneedles through the porous channels left by dissolving drug particles. MITP was shown to be able to encapsulate up to 70 mg of lidocaine. In vitro permeation through rat skin demonstrated that MITP delivered a significantly higher amount of lidocaine than a commercial patch and with a faster onset of drug permeation.
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Affiliation(s)
- Jaspreet Singh Kochhar
- Department of Pharmacy, National University of Singapore , 18 Science Drive 4, Singapore 117543, Singapore
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Nageswara Rao R, Satyanarayana Raju S. Enantioselective separation and simultaneous determination of tolperisone and eperisone in rat plasma by LC-MS/MS. Chirality 2013; 25:622-7. [PMID: 23840024 DOI: 10.1002/chir.22187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 04/01/2013] [Indexed: 11/11/2022]
Abstract
Tolperisone and eperisone used as muscle relaxants possess one chiral center each and exist as two optical isomers for each drug. Therefore, enantioselective assays to measure each enantiomer in biological matrices are of great importance. In the present study a simple and complete reverse-phase liquid chromatography tandem mass spectrometric method for separation and enantioselective determination of tolperisone and eperisone in rat plasma was developed. The analytes were extracted from rat plasma by a simple protein precipitation method with acetonitrile as the extraction solvent. The enantioselective separation of analytes was achieved on a Cellulose Tris (4-chloro-3-methylphenylcarbamate) chiral column with a mobile phase of acetonitrile: 10 mM ammonium acetate in an isocratic mode of elution and mass spectrometric detection. The calibration curve for each enantiomer was found to be linear over 0.2 to 20 ng/mL for each enantiomer. The proposed method exhibited good intra- and interday precision (% CV) ranged between 0.95-6.05% and 1.11-8.21%, respectively. The intra- and interday accuracy for the proposed assay method ranged between 94.0-100.5% and 92.7-102.1%, respectively. The proposed method was validated as per regulatory guidelines.
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Affiliation(s)
- R Nageswara Rao
- Analytical Chemistry Division, Indian Institute of Chemical Technology, Tarnaka, Hyderabad, India, -500 007
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Patel MJ, Badmanaban R, Patel CN. Reversed phase-high performance liquid chromatographic method for simultaneous estimation of tolperisone hydrochloride and etodolac in a combined fixed dose oral formulations. Pharm Methods 2013; 2:124-9. [PMID: 23781442 PMCID: PMC3658046 DOI: 10.4103/2229-4708.84458] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
A reversed-phase liquid chromatographic (RP-HPLC) method was developed for the simultaneous determination of tolperisone hydrochloride (TOLP) and etodolac (ETD) in a combined fixed dose oral formulation. The analysis was carried out using a phenomenax C-18, pre-packed column. A mobile phase containing a phosphate buffer (pH 5.5) : Methanol : Acetonitrile : Tri-ethylamine (40 : 40 : 20 : 1.5), with the pH adjusted to orthophosphoric acid, was pumped at a flow rate of 1.0 ml min1 with a UV-detector and PDA detection at 257 nm. Retention time was 3.91 minutes and 6.89 minutes for TOLP and ETD, respectively. The method was validated for linearity, accuracy, precision, sensitivity, and specificity. The method showed good linearity in the range of 3 – 21 μg ml for TOLP μg / ml and 8 – 56 μg / ml for ETD. The detection limit of the proposed method was 0.16 μg / ml and 0.58 μg / ml for TOLP and ETD, respectively. The quantification limit of the proposed method was 0.51 μg / ml and 1.7 μg / ml for TOLP and ETD, respectively. The % recovery was within the range of 99.42 – 101.15 for TOLP and 98.63 – 100.94 for ETD. The percentage RSD for precision of the method was found to be less than 2%. The method was validated as per the International Conference on Harmonization (ICH) guidelines. The developed method could be applied for routine analysis of TOLP and ETD in tablet dosage form.
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Affiliation(s)
- Mit J Patel
- Quality Assurance, Shri Sarvajanik Pharmacy College, Nr. Arvind Baug, Mehsana, Gujarat, India
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Raju TVR, Seshadri RK, Arutla S, Mohan TSSJ, Rao IM, Nittala SR. Development and Validation of a Precise, Single HPLC Method for the Determination of Tolperisone Impurities in API and Pharmaceutical Dosage Forms. Sci Pharm 2013; 81:123-38. [PMID: 23641333 PMCID: PMC3617673 DOI: 10.3797/scipharm.1209-17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Accepted: 11/05/2012] [Indexed: 11/22/2022] Open
Abstract
A novel, sensitive, stability-indicating HPLC method has been developed for the quantitative estimation of Tolperisone-related impurities in both bulk drugs and pharmaceutical dosage forms. Effective chromatographic separation was achieved on a C18 stationary phase with a simple mobile phase combination delivered in a simple gradient programme, and quantitation was by ultraviolet detection at 254 nm. The mobile phase consisted of a buffer and acetonitrile delivered at a flow rate 1.0 ml/min. The buffer consisted of 0.01 M potassium dihydrogen phosphate with the pH adjusted to 8.0 by using diethylamine. In the developed HPLC method, the resolution between Tolperisone and its four potential impurities was found to be greater than 2.0. Regression analysis showed an R value (correlation coefficient) of greater than 0.999 for the Tolperisone impurities. This method was capable of detecting all four impurities of Tolperisone at a level of 0.19 μg/mL with respect to the test concentration of 1000 μg/mL for a 10 µl injection volume. The tablets were subjected to the stress conditions of hydrolysis, oxidation, photolysis, and thermal degradation. Considerable degradation was found to occur in base hydrolysis, water hydrolysis, and oxidation. The stress samples were assayed against a qualified reference standard and the mass balance was found to be close to 100%. The established method was validated and found to be linear, accurate, precise, specific, robust, and rugged.
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Affiliation(s)
- Thummala Veera Raghava Raju
- Analytical Research and Development, Integrated Product Development, Dr. Reddy’s Laboratories Ltd., Bachupally, Hyderabad-500072, India
| | - Raja Kumar Seshadri
- Analytical Research and Development, Integrated Product Development, Dr. Reddy’s Laboratories Ltd., Bachupally, Hyderabad-500072, India
| | - Srinivas Arutla
- Analytical Research and Development, Integrated Product Development, Dr. Reddy’s Laboratories Ltd., Bachupally, Hyderabad-500072, India
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9
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Determination of tolperisone in human plasma by liquid chromatography/tandem mass spectrometry for clinical application. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 911:59-63. [DOI: 10.1016/j.jchromb.2012.10.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Revised: 10/16/2012] [Accepted: 10/22/2012] [Indexed: 11/24/2022]
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10
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Hubicka U, Krzek J, Żuromska-Witek B. TLC-DENSITOMETRIC DETERMINATION OF TOLPERISONE AND ITS IMPURITIES 4-METHYLPROPIOPHENONE AND PIPERIDINE IN PHARMACEUTICAL PREPARATIONS. J LIQ CHROMATOGR R T 2012. [DOI: 10.1080/10826076.2012.675862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Urszula Hubicka
- a Department of Inorganic and Analytical Chemistry , Jagiellonian University, Medical College , Kraków , Poland
| | - Jan Krzek
- a Department of Inorganic and Analytical Chemistry , Jagiellonian University, Medical College , Kraków , Poland
| | - Barbara Żuromska-Witek
- a Department of Inorganic and Analytical Chemistry , Jagiellonian University, Medical College , Kraków , Poland
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Draper DO, Coglianese M, Castel C. Absorption of iontophoresis-driven 2% lidocaine with epinephrine in the tissues at 5 mm below the surface of the skin. J Athl Train 2012; 46:277-81. [PMID: 21669097 DOI: 10.4085/1062-6050-46.3.277] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
CONTEXT In a recent study, we were unable to measure lidocaine in the human calf at a 5-mm depth via iontophoresis. We surmised that this might be due to a lack of epinephrine in the compound. Because epinephrine is a vasoconstrictor, it might allow the drug to pass beyond the capillaries and be delivered to the deeper tissues. OBJECTIVE To determine if iontophoresis could deliver lidocaine with epinephrine 5 mm under the surface of human skin, as measured by microdialysis. DESIGN Descriptive laboratory study. SETTING Therapeutic modalities research laboratory. PATIENTS OR OTHER PARTICIPANTS Ten volunteers (5 males, 5 females; age, 15-28 years) with less than 5 mm of adipose tissue in the area we measured and with no allergies to lidocaine participated. The measurement area had been free of any injury, swelling, or infection for at least 3 months before the study. INTERVENTION(S) We inserted a microdialysis probe 0.5 cm under the skin of the right lower leg. Next, microdialysis was performed through this area for 60 minutes, which allowed local skin blood flow to return to baseline. We then performed iontophoresis at 40 mA/min using 2 mL of 2% lidocaine. Iontophoresis was performed over this area for 10.5 minutes to collect the lidocaine samples. After this stage, the electrode was left in place for another 50 minutes for a total of 60 minutes. MAIN OUTCOME MEASURE(S) The samples of the drug were analyzed via reverse-phase high-performance liquid chromatography (RP-HPLC) in the chemistry department. RESULTS The RP-HPLC analysis confirmed the presence of lidocaine in all 10 participants. The mean concentration of lidocaine detected at the 5-mm depth was calculated as 3.63 mg/ mL (greater than 18% of delivered concentration). CONCLUSIONS We found that 2% lidocaine can be delivered up to 5 mm below the surface of the skin when the drug compound contains epinephrine and when passive delivery occurs for at least 50 minutes after the active delivery has terminated.
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12
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Simultaneous determination of lidocaine hydrochloride, hydrocortisone and nystatin in a pharmaceutical preparation by RP-LC. J Pharm Biomed Anal 2011; 56:641-4. [DOI: 10.1016/j.jpba.2011.06.028] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2011] [Revised: 06/27/2011] [Accepted: 06/28/2011] [Indexed: 11/21/2022]
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Coglianese M, Draper DO, Shurtz J, Mark G. Microdialysis and delivery of iontophoresis-driven lidocaine into the human gastrocnemius muscle. J Athl Train 2011; 46:270-6. [PMID: 21669096 DOI: 10.4085/1062-6050-46.3.270] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
CONTEXT Iontophoresis is used frequently in physical medicine and rehabilitation, but many research techniques do not adequately measure it for depth of medicine delivery. OBJECTIVE To determine if iontophoresis delivers lidocaine 5 mm under the surface of human skin. DESIGN Descriptive laboratory study. SETTING Therapeutic modalities research laboratory. PATIENTS OR OTHER PARTICIPANTS Eight men and 5 women volunteers (age range = 21± 2.3 years) who had less than 5 mm of adipose tissue in the area we measured participated in the study. INTERVENTION(S) We inserted a microdialysis probe 5 mm under the skin of both legs and into the triceps surae muscle groups of 10 participants. Microdialysis was performed for 60 minutes to allow a recovery period for local skin blood flow to return to baseline. We then delivered 2 mL of 1% lidocaine to the treatment leg via iontophoresis at 40 mA/min. Next, microdialysis was performed continuously in both legs during the treatment and for 30 minutes posttreatment to collect the lidocaine samples. After we had gathered the samples, several saline solutions with various amounts of lidocaine (0.005%, 0.025%, 0.05%, and 0.1 %) were prepared in vitro and analyzed. Although we did not intend to do so as a part of the original study, we also performed an identical follow-up study at 3 mm in 3 participants. MAIN OUTCOME MEASURE(S) Both in vitro and in vivo samples were analyzed via reverse-phase high-performance liquid chromatography (RP-HPLC). A protocol for detection and quantification of lidocaine using RP-HPLC was followed. RESULTS We did not detect any measurable levels or concentrations of lidocaine in the 10 control samples. According to the RP-HPLC analysis, the 10 treatment samples also were negative for the presence of lidocaine. However, when we performed the study at 3 mm, microdialysis detected lidocaine in the 3 participants at this depth in the treatment leg only. CONCLUSIONS Measurable levels of lidocaine were not detected at 5 mm but were found at 3 mm. More studies are needed to determine the efficacy of microdialysis in measuring iontophoresis-delivered compounds.
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Stiedl B, Kovács-Kiss D, Ludányi K, Bódis A, Klebovich I, Antal I. LC-UV Assay of Tolperisone HCl from Sustained Release Matrix Tablets. Chromatographia 2010. [DOI: 10.1365/s10337-010-1525-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Quasthoff S, Möckel C, Zieglgänsberger W, Schreibmayer W. Tolperisone: a typical representative of a class of centrally acting muscle relaxants with less sedative side effects. CNS Neurosci Ther 2008; 14:107-19. [PMID: 18482024 DOI: 10.1111/j.1527-3458.2008.00044.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Tolperisone, a piperidine derivative, is assigned to the group of centrally acting muscle relaxants and has been in clinical use now for decades. The review summarizes the known pharmacokinetics, pharmacodynamics, toxicology and side effects in humans and the clinical use of tolperisone. A future perspective for further exploration of this drug is given.
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Norouzi P, Ganjali M, Daneshgar P, Dinarvand R, Moosavi-Movahedi A, Saboury A. Development of fast Fourier transform continuous cyclic voltammetry at Au microelectrode in flowing solutions as a novel method for sub-nanomolar monitoring of lidocaine in injection and biological fluids. Anal Chim Acta 2007; 590:74-80. [DOI: 10.1016/j.aca.2007.03.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2006] [Revised: 02/09/2007] [Accepted: 03/12/2007] [Indexed: 10/23/2022]
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17
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Bae JW, Park YS, Sohn UD, Myung CS, Ryu BK, Jang CG, Lee SY. HPLC determination of tolperisone in human plasma. Arch Pharm Res 2006; 29:339-42. [PMID: 16681042 DOI: 10.1007/bf02968581] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A simple high performance liquid chromatographic (HPLC) method was developed for the determination of tolperisone in human plasma. Tolperisone and internal standard (chlorphenesin) were isolated from 1 mL of plasma using 8 mL of dichlormethane. The organic phase was collected and evaporated under nitrogen gas. The residue was then reconstituted with 300 mL aliquot of mobile phase and a 100 mL aliquot was injected onto the C18 reverse-phased column. The mobile phase, 45% methanol containing 1% glacial acetic acid and 0.05% 1-hexanesulfonic acid was run at a flow rate of 1 mL/min. The column effluent was monitored using UV detector at 260 nm. The retention times for tolperisone and the internal standard were approximately 7.1 and 8.4 min, respectively. The standard curve was linear with minimal intra-day and inter-day variability. The quantification limit of tolperisone in human plasma was 10 ng/ mL. The proposed method has been applied to the determination of pharmacokinetic profile of tolperisone in Koreans. The Tmax of tolperisone in Koreans (0.94 +/- 0.42 h) was not significantly differ from that reported in Europeans (0.5-1 h), but the mean half-life in Koreans (1.14 +/- 0.27 h) was shorter than that in Europeans (2.56 +/- 0.2 h). The proposed HPLC method is simple, accurate, reproducible and suitable for pharmacokinetic study of tolperisone.
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Affiliation(s)
- Jung-Woo Bae
- College of Pharmacy, Sungkyunkwan University, Suwon 440-746, Korea
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Aksu Ö, Bozdoğan A, Kunt G. Simultaneous Determination of Mepyramine Maleate, Lidocaine Hydrochloride, and Dexpanthenol in Pharmaceutical Preparations by Partial Least‐Squares Multivariate Calibration. ANAL LETT 2006. [DOI: 10.1080/00032710600611210] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Malenovic A, Medenica M, Ivanovic D, Jancic B, Markovic S. Development and validation of RP–HPLC method for cetrimonium bromide and lidocaine determination. ACTA ACUST UNITED AC 2005; 60:157-61. [PMID: 15752474 DOI: 10.1016/j.farmac.2004.11.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2004] [Revised: 11/01/2004] [Accepted: 11/17/2004] [Indexed: 11/20/2022]
Abstract
The simple and rapid RP-HPLC method, for the simultaneous determination of lidocaine and cetrimonium bromide in the presence of pellet color corrigent, was developed. Separations were performed on a Beckman Ultrasphere ODS 4.6 mm x 15 cm, 5 microm particle column at 40 degrees C. The mobile phase consisted of water phase and acetonitrile (72:28 V/V), pH value of the mobile phase was adjusted to 2.0 with 85% ortophosphoric acid. Bisacodil was used as an internal standard. The flow rate was 1 ml/min and UV detection was performed at 208 nm. The proposed RP-HPLC method was validated and all the parameters for the validation of the method are given. According to the obtained results, the developed method was found to be suitable and accurate for the determination of these drugs in commercial formulations.
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Affiliation(s)
- A Malenovic
- Department of Drug Analysis, Faculty of Pharmacy, Vojvode Stepe 450, 11000 Belgrade, Serbia and Montenegro
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20
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Anderson MS, Lu B, Abdel-Rehim M, Blomberg S, Blomberg LG. Utility of nonaqueous capillary electrophoresis for the determination of lidocaine and its metabolites in human plasma: a comparison of ultraviolet and mass spectrometric detection. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2004; 18:2612-2618. [PMID: 15481095 DOI: 10.1002/rcm.1666] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A nonaqueous capillary electrophoresis/electrospray mass spectrometry method for the separation of lidocaine (LID) and two of its metabolites, monoethylglycinexylidide (MEGX) and glycinexylidide (GX), has been developed. The separation medium was: 70 mM ammonium formate and 2.0 M formic acid in acetonitrile/methanol (60:40 v/v). With a sheath liquid of methanol/water (80:20 v/v) containing 2% formic acid and positive ion detection, reproducible determinations (8-11% relative standard deviation (RSD)) of lidocaine and its metabolites were performed in spiked human plasma. The limits of detection (LODs) were between 69.1 and 337 nM. The influences of sheath liquid composition, nebulizing gas pressure and drying gas temperature on the separation were examined.
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Affiliation(s)
- Magnus S Anderson
- Department of Chemistry, Karlstad University, SE-651 88 Karlstad, Sweden
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Youngvises N, Liawruangrath B, Liawruangrath S. Simultaneous micellar LC determination of lidocaine and tolperisone. J Pharm Biomed Anal 2003; 31:629-38. [PMID: 12644189 DOI: 10.1016/s0731-7085(02)00693-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A micellar liquid chromatography (MLC) procedure was developed for the simultaneous separation and determination of lidocaine hydrochloride (LD HCl) and tolperisone hydrochloride (TP HCl) using a short-column C18 (12.5 mm x 4.6 mm, 5 microm), sodium dodecyl sulfate (SDS) with a small amount of isopropanol, and diode array detector. The optimum conditions for the simultaneous determination of both drugs were 0.075 mol l(-1) SDS-7.5% (v/v) isopropanol with a flow rate of 0.7 ml min(-1) and detection at 210 nm. The LOD (2S/N) of LD HCl was 0.73 ng 20 microl(-1), whereas that of TP HCl was 1.43 ng 20 microl(-1). The calibration curves for LD HCl and TP HCl were linear over the ranges 0.125-500 microg ml(-1) (r(2)=0.9999) and 1.00-500 microg ml(-1) (r(2)=0.9997), respectively. The %recoveries of both drugs were in the range 98-103% and the %RSD values were less than 2. The proposed method has been successfully applied to the simultaneous determination of TP HCl and LD HCl in various pharmaceutical preparations.
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Affiliation(s)
- Napaporn Youngvises
- Faculty of Science, Department of Chemistry, Chiang Mai University, 50200, Chiang Mai, Thailand
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