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Patel B, Jangid AG, Suhagia BN, Desai N. Challenges in Simultaneous Determination of Hydrochlorothiazide and Ramipril in Human Plasma: Application to a Bioequivalence Study. J Chromatogr Sci 2018; 56:867-878. [DOI: 10.1093/chromsci/bmy055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Indexed: 01/17/2023]
Affiliation(s)
- Bhargav Patel
- Department of Chemistry, St. Xavier’s College, Navrangpura, Ahmedabad, India
- Accutest Research Lab, Satellite, Ahmedabad, India
| | | | - B N Suhagia
- Faculty of Pharmacy, Dharamsinh Desai University, Nadiad, Gujarat, India
| | - Nirmal Desai
- Department of Chemistry, St. Xavier’s College, Navrangpura, Ahmedabad, India
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2
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Goswami D, Kumar A, Khuroo AH, Monif T, Thudi NR, Shrivastav VK, Dubey SK, Shingla AK, Prakash M, Mehra S. Pharmacokinetic Estimation of Losartan, Losartan Carboxylic Acid and Hydrochlorothiazide in Human Plasma by LC/MS/MS Validated Method. ACTA ACUST UNITED AC 2008. [DOI: 10.1080/10601330802600901] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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3
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Parekh SA, Pudage A, Joshi SS, Vaidya VV, Gomes NA, Kamat SS. Simultaneous determination of hydrochlorothiazide, quinapril and quinaprilat in human plasma by liquid chromatography-tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2008; 873:59-69. [DOI: 10.1016/j.jchromb.2008.07.046] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2008] [Revised: 07/19/2008] [Accepted: 07/27/2008] [Indexed: 10/21/2022]
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4
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Liu F, Xu Y, Gao S, Zhang J, Guo Q. Determination of hydrochlorothiazide in human plasma by liquid chromatography/tandem mass spectrometry. J Pharm Biomed Anal 2007; 44:1187-91. [PMID: 17560749 DOI: 10.1016/j.jpba.2007.04.020] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2007] [Revised: 04/09/2007] [Accepted: 04/13/2007] [Indexed: 11/28/2022]
Abstract
In this study, a fast and sensitive liquid chromatography/tandem mass spectrometry method for determination of hydrochlorothiazide in human plasma was developed and validated. The analyte and irbesartan, used as the internal standard, were precipitated and extracted from plasma using methanol. Analysis was performed on a Phenomenex Kromasil C(8) column with water and methanol (27:73, v/v) as the mobile phase. Linearity was assessed from 0.78 to 200 ng/mL in plasma. The analytical method proved to be applicable in a pharmacokinetic study after oral administration of 12 mg hydrochlorothiazide tablets to 20 healthy volunteers.
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Affiliation(s)
- Fei Liu
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
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5
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Ateş Z, Özden T, Özilhan S, Toptan S. Simultaneous Determination of Carbamazepine and its Active Metabolite Carbamazepine-10,11-epoxide in Human Plasma by UPLC. Chromatographia 2007. [DOI: 10.1365/s10337-007-0299-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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6
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Ateş Z, Özden T, Özilhan S, Eren S. Improved Ultra-Performance LC Determination of Indapamide in Human Plasma. Chromatographia 2007. [DOI: 10.1365/s10337-007-0300-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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7
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Li L, Sun J, Yang P, He Z. Liquid Chromatography–Electrospray Ionization–Mass Spectrometric Method for the Determination of Hydrochlorothiazide in Human Plasma: Application to a Pharmacokinetic Study. ANAL LETT 2006. [DOI: 10.1080/00032710600867465] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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8
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Kolocouri F, Dotsikas Y, Apostolou C, Kousoulos C, Loukas YL. Simultaneous determination of losartan, EXP-3174 and hydrochlorothiazide in plasma via fully automated 96-well-format-based solid-phase extraction and liquid chromatography–negative electrospray tandem mass spectrometry. Anal Bioanal Chem 2006; 387:593-601. [PMID: 17119933 DOI: 10.1007/s00216-006-0990-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2006] [Revised: 10/25/2006] [Accepted: 11/03/2006] [Indexed: 10/23/2022]
Abstract
An automated, sensitive and high-throughput liquid chromatographic/electrospray tandem mass spectrometric (LC-MS/MS) assay was developed for the simultaneous determination of losartan (LOS), its major circulating metabolite EXP-3174 and hydrochlorothiazide (HCTZ) in human plasma. LOS and HCTZ coexist in the same drug formulation, and this is the first method that enables the simultaneous determination of both drugs along with the active metabolite of LOS. Since these drugs have different physicochemical properties, the employment of a liquid-liquid extraction (LLE) protocol was precluded. A fully automated solid-phase extraction (SPE) protocol, based on 96-well format plates, was used to isolate these compounds and furosemide (internal standard, IS) from plasma. Washing and elution steps were amended accordingly in order to minimize any matrix effect from components of the plasma without reducing the elution of the molecules of interest. The compounds were eluted from a C18 column and detected with an API 3000 triple-quadrupole mass spectrometer using negative electrospray ionization and multiple reaction monitoring (MRM). The assay was linear over the range 1.00-400 ng/mL for LOS and EXP-3174 and 0.500-200 ng/mL for HCTZ, respectively, when 200 microl of plasma was used in the extraction. The overall intra- and interassay variations were within acceptance limits. The analysis time for each sample was 4 min, and more than 300 samples could be analyzed in one day by running the system overnight. The assay was simple, highly sensitive, selective, precise, fast, and it enables the reliable determination of LOS, EXP-3174 and HCTZ in pharmacokinetic or bioequivalence studies after per os administration of a single tablet containing both drugs.
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Affiliation(s)
- Filomila Kolocouri
- Laboratory of Pharmaceutical Analysis and Bioequivalence Services (GLP Compliant), Department of Pharmaceutical Chemistry, School of Pharmacy, University of Athens, 157 71, Athens, Greece
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9
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Papadoyannis IN, Samanidou VF, Georga KA, Georgarakis E. High Pressure Liquid Chromatographic Determination of Hydrochlorothiazide (HCT) in Pharmaceutical Preparations and Human Serum After Solid Phase Extraction. J LIQ CHROMATOGR R T 2006. [DOI: 10.1080/10826079808001251] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- I. N. Papadoyannis
- a Laboratory of Analytical Chemistry Department of Chemistry , University of Thessaloniki , GR-54006, Thessaloniki, Greece
| | - V. F. Samanidou
- a Laboratory of Analytical Chemistry Department of Chemistry , University of Thessaloniki , GR-54006, Thessaloniki, Greece
| | - K. A. Georga
- a Laboratory of Analytical Chemistry Department of Chemistry , University of Thessaloniki , GR-54006, Thessaloniki, Greece
| | - E. Georgarakis
- b Section of Pharmaceutics and Drug Control Department of Pharmacy Aristotle , University of Thessaloniki , GR-54006, Thessaloniki, Greece
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10
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Shetkar PB, Shinde VM. Simultaneuous Determination of Enalpril Maleate and Hydrochlorothiazide in Tablets by Reversed Phase HPLC. ANAL LETT 2006. [DOI: 10.1080/00032719708004044] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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11
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Niopas I, Daftsios AC. A VALIDATED HPLC METHOD FOR THE DETERMINATION OF HYDRO-CHLOROTHIAZIDE IN HUMAN PLASMA AND ITS APPLICATION IN PHARMACOKINETIC STUDIES. J LIQ CHROMATOGR R T 2006. [DOI: 10.1081/jlc-120008762] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Ioannis Niopas
- a Department of Pharmacy , School of Health Sciences, Aristotle University of Thessaloniki , Thessaloniki, 540 06, Greece
| | - Athanasios C. Daftsios
- b Laboratory of Pharmaco-Chemical Analyses , American Farm School of Thessaloniki , P. O. Box 23, Thessaloniki, 551 02, Greece
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12
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Chmielewska A, Konieczna L, Plenis A, Lamparczyk H. Sensitive quantification of chosen drugs by reversed-phase chromatography with electrochemical detection at a glassy carbon electrode. J Chromatogr B Analyt Technol Biomed Life Sci 2006; 839:102-11. [PMID: 16716774 DOI: 10.1016/j.jchromb.2006.04.021] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2006] [Revised: 04/14/2006] [Accepted: 04/20/2006] [Indexed: 11/15/2022]
Abstract
Reversed-phase-high-performance liquid chromatographic method with electrochemical detection has proven to be a highly sensitive and selective method for determination of trace components in complex biological samples, and the electrochemical detector becomes an important alternative tool to ultraviolet and fluorescence detectors. A rapid and sensitive method for the accurate determination of metoclopramide, hydrochlorothiazide, imipramine and diclofenac in serum or plasma samples is described. The method is based on liquid-liquid extraction. The compounds were separated on C-18 column as stationary phase with a different binary mixture as mobile phase. Proposed method was validated with respect to specificity, linearity range, limit of detection and quantitation, precision, accuracy and successfully applied in a pharmacokinetic studies.
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Affiliation(s)
- Aleksandra Chmielewska
- Medical University of Gdańsk, Faculty of Pharmacy, Hallera 107, PL-80-416 Gdańsk, Poland.
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Ramakrishna NVS, Vishwottam KN, Manoj S, Koteshwara M, Wishu S, Varma DP. Sensitive liquid chromatography-tandem mass spectrometry method for quantification of hydrochlorothiazide in human plasma. Biomed Chromatogr 2005; 19:751-60. [PMID: 15856489 DOI: 10.1002/bmc.510] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A simple, rapid, sensitive and specific liquid chromatography-tandem mass spectrometry method was developed and validated for quantification of hydrochlorothiazide (I), a common diuretic and anti-hypertensive agent. The analyte and internal standard, tamsulosin (II) were extracted by liquid-liquid extraction with diethyl ether-dichloromethane (70:30, v/v) using a Glas-Col Multi-Pulse Vortexer. The chromatographic separation was performed on a reversed-phase column (Waters symmetry C18) with a mobile phase of 10 mm ammonium acetate-methanol (15:85, v/v). The protonated analyte was quantitated in negative ionization by multiple reaction monitoring with a mass spectrometer. The mass transitions m/z 296.1 solidus in circle 205.0 and m/z 407.2 solidus in circle 184.9 were used to measure I and II, respectively. The assay exhibited a linear dynamic range of 0.5-200 ng/mL for hydrochlorothiazide in human plasma. The lower limit of quantitation was 500 pg/mL, with a relative standard deviation of less than 9%. Acceptable precision and accuracy were obtained for concentrations over the standard curve ranges. A run time of 2.5 min for each sample made it possible to analyze a throughput of more than 400 human plasma samples per day. The validated method has been successfully used to analyze human plasma samples for application in pharmacokinetic, bioavailability or bioequivalence studies.
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Affiliation(s)
- N V S Ramakrishna
- Biopharmaceutical Research, Suven Life Sciences Ltd, Serene Chambers, Road 7, Banjara Hills, Hyderabad 500034, India.
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Zhu Z, Vachareau A, Neirinck L. Liquid chromatography-mass spectrometry method for determination of ramipril and its active metabolite ramiprilat in human plasma. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 779:297-306. [PMID: 12361743 DOI: 10.1016/s1570-0232(02)00398-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
A fast and robust liquid chromatography-mass spectrometry (LC-MS-MS) method has been developed for simultaneous quantitation of the angiotensin-converting enzyme (ACE) inhibitor, ramipril and its metabolite ramiprilat in human plasma. The method involves a solid-phase extraction from plasma, simple isocratic chromatography conditions and mass spectrometric detection that enables a detection limit at sub-nanogram levels. The proposed method has been validated with a linear range of 0.5-250 ng/ml for both ramipril and ramiprilat. The overall recoveries for ramipril and ramiprilat were 88.7 and 101.8%, respectively.
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Affiliation(s)
- Zhimeng Zhu
- Pharmascience, 6111 Royalmount Ave, Suite 100, Montreal, Quebec, H4P 2T4, Canada.
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15
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Belal F, Al-Zaagi IA, Gadkariem EA, Abounassif MA. A stability-indicating LC method for the simultaneous determination of ramipril and hydrochlorothiazide in dosage forms. J Pharm Biomed Anal 2001; 24:335-42. [PMID: 11199212 DOI: 10.1016/s0731-7085(00)00474-x] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A simple, rapid and sensitive HPLC method has been developed for the simultaneous determination of ramipril and hydrochlorothiazide in their dosage forms. Acetonitrile: sodium perchlorate solution (0.1 M) adjusted to pH 2.5+/-0.2 with phosphoric acid (46:54 v/v), was used as the mobile phase, at a flow rate of 1.5 ml/min. A supelcosil LC-8 column (5 microm), 15 cm x 4.6 mm i.d. was utilized as stationary phase. Detection was affected spectrophotometrically at 210 nm. Clobazam was used as an internal standard. The method was also applied for the determination of ramipril in the presence of its degradation products. Linearity ranges for ramipril and hydrochlorothiazide were 4.5-45 and 0.6-14 microg/ml, respectively. Minimum detection limits (S/N = 2) obtained were 180 and 23 ng/ml for ramipril and hydrochlorothiazide, respectively. The proposed method was further applied to the analysis of tablets containing the two drugs, the percentage recoveries +/- S.D. (n = 5) were 100.45%+/-0.63 and 99.55%+/-0.78 for ramipril and hydrochlorothiazide, respectively.
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Affiliation(s)
- F Belal
- Department of P armaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia.
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Rosado-Maria A, Gasco-Lopez AI, Santos-Montes A, Izquierdo-Hornillos R. High-performance liquid chromatographic separation of a complex mixture of diuretics using a micellar mobile phase of sodium dodecyl sulphate. Application to human urine samples. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 2000; 748:415-24. [PMID: 11087084 DOI: 10.1016/s0378-4347(00)00367-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A systematic optimization of the HPLC separation of a complex mixture containing 19 diuretics by micellar liquid chromatography using sodium dodecyl sulphate (SDS), a Hypersil (150 mmx3.0 mm I.D., 5 microm) C18 column, a flow-rate of 0.5 ml min(-1) and UV absorbance detection has been carried out. Several mobile phases consisting of SDS and organic modifiers such as acetonitrile, tetrahydrofuran, propanol, butanol or pentanol, and the pH adjusted to 3.2, were tested. The effect of the organic modifier and SDS concentration on the retention behavior and separation of the diuretics was investigated. A mobile phase containing 40 mM SDS and 4% tetrahydrofuran was finally selected. Under these conditions, 14 out of 19 diuretics were separated in about 31 min. A bivariant optimization method for the mobile phase SDS-tetrahydrofuran corroborated the above results. The effect of temperature on the retention was also studied, and 50 degrees C was selected. The optimized method was applied to human urine samples of subjects administered Diurex (tablets containing 20 mg of the active ingredient xipamide) without sample preparation.
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Affiliation(s)
- A Rosado-Maria
- Departamento de Química Analítica, Facultad de Química, Universidad Complutense, Madrid, Spain
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17
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Medvedovici A, Mircioiu C, David V, Miron DS. Liquid extraction and HPLC-DAD assay of hydrochlorothiazide from plasma for a bioequivalence study at the lowest therapeutic dose. Eur J Drug Metab Pharmacokinet 2000; 25:91-6. [PMID: 11112088 DOI: 10.1007/bf03190073] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The main parameters considered in optimizing the liquid extraction and quantitative assay were the yield, precision, limit of quantification, time required for extraction and concentration, and quantity of solvent. The influence on these parameters of the following factors was examined: nature of the extracting solvent, quantity of solvent, co-extraction solvent, and duration of stirring. Instead of equilibrium parameters of the involved thermodynamic system, a kinetic approach was preferred in terms of the effective partition 'constant', which is not really constant but a function of time and extraction conditions. The final selected method, considered to be rapid and simple, was applied to determine the pharmacokinetics of hydrochlorotiazide (HCT) after administration of Capozide (Bristol-Myers Squibb) tablets containing 50 mg Captopril and 25 mg HCT, to 4 healthy volunteers. The results obtained were in accordance with the pharmacokinetic parameters of HCT reported in the literature.
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Affiliation(s)
- A Medvedovici
- Department of Analytical Chemistry, University of Bucharest, Romania
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18
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Martin E, Hern´ndez O, Jim´nez AI, Jim´nez F, Arias JJ. A Partial Least-Squares Multivariate Calibration Method for the Simultaneous Spectrophotometric Determination of Spironolactone, Canrenone and Hydrochlorothiazide. ANAL LETT 1998. [DOI: 10.1080/00032719808005267] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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19
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Richter K, Oertel R, Kirch W. New sensitive method for the determination of hydrochlorothiazide in human serum by high-performance liquid chromatography with electrochemical detection. J Chromatogr A 1996; 729:293-6. [PMID: 9004952 DOI: 10.1016/0021-9673(95)00900-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A HPLC method with a very sensitive electrochemical detection has been developed for determining the diuretic agent hydrochlorothiazide (HCT) in serum of volunteers to whom a single dose of the fixed combination of 12.5 mg HCT and 25 mg triamterene was administered. In the present method samples (0.2 ml serum, pH 7) were purified by extraction of HCT into 5 ml tert.-butyl-methyl ether. The separated organic phase was spiked with p-aminobenzoic acid (PABA) standard. The separation was performed on a reversed-phase C18 column using phosphate buffer-acetonitrile (90:10). A coulometric cell was used to measure HCT and an ultraviolet detector for PABA. The limit of quantitation for serum samples of only 200 microliters was 5 ng/ml (i.e. 60 pg HCT/injection) with a good reproducibility (1-8%). Short retention times were found: 1.2 min for PABA and 5.8 min for HCT.
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Affiliation(s)
- K Richter
- Institut für Klinische Pharmakologie, Medizinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany
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20
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Hsieh JY, Lin C, Matuszewski BK, Dobrinska MR. Fully automated methods for the determination of hydrochlorothiazide in human plasma and urine. J Pharm Biomed Anal 1994; 12:1555-62. [PMID: 7696380 DOI: 10.1016/0731-7085(94)00096-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
LC assays utilizing fully automated sample preparation procedures on Zymark PyTechnology Robot and BenchMate Workstation for the quantification of hydrochlorothiazide (HCTZ) in human plasma and urine have been developed. After aliquoting plasma and urine samples, and adding internal standard (IS) manually, the robot executed buffer and organic solvent addition, liquid-liquid extraction, solvent evaporation and on-line LC injection steps for plasma samples, whereas, BenchMate performed buffer and organic solvent addition, liquid-liquid and solid-phase extractions, and on-line LC injection steps for urine samples. Chromatographic separations were carried out on Beckman Octyl Ultrasphere column using the mobile phase composed of 12% (v/v) acetonitrile and 88% of either an ion-pairing reagent (plasma) or 0.1% trifluoroacetic acid (urine). The eluent from the column was monitored with UV detector (271 nm). Peak heights for HCTZ and IS were automatically processed using a PE-Nelson ACCESS*CHROM laboratory automation system. The assays have been validated in the concentration range of 2-100 ng ml-1 in plasma and 0.1-20 micrograms ml-1 in urine. Both plasma and urine assays have the sensitivity and specificity necessary to determine plasma and urine concentrations of HCTZ from low dose (6.25/12.5 mg) administration of HCTZ to human subjects in the presence or absence of losartan.
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Affiliation(s)
- J Y Hsieh
- Department of Drug Metabolism, Merck Research Laboratories, West Point, PA 19486, USA
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de Vries JX, Voss A. Simple determination of hydrochlorothiazide in human plasma and urine by high performance liquid chromatography. Biomed Chromatogr 1993; 7:12-4. [PMID: 8431674 DOI: 10.1002/bmc.1130070104] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The diuretic drug hydrochlorothiazide (HCT) is used mainly for treatment of mild to moderate hypertension and is usually administered with other drugs. An assay for the determination of HCT in human plasma and urine by high performance liquid chromatography (HPLC) has been developed. Samples were purified by solvent extraction and analysed by reversed phase HPLC with ultraviolet detection, using hydroflumethiazide as the internal standard; plasma was eluted using gradient elution and urine was analysed isocratically. The method is simple to perform, is sensitive (detection limit 0.01 micrograms/mL in plasma and 0.2 micrograms/mL for urine); it showed good reproducibility (3-8%). A great number of drugs did not interfere with the assay and the method was used for pharmacokinetic studies in healthy subjects, but samples from patients can also be analysed with high selectivity.
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Affiliation(s)
- J X de Vries
- Abteilung für Klinische Pharmakologie, Medizinische Klinik der Universität, Heidelberg, Germany
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Miller RB, Amestoy C. A liquid chromatographic method for the determination of hydrochlorothiazide in human plasma. J Pharm Biomed Anal 1992; 10:541-5. [PMID: 1420482 DOI: 10.1016/0731-7085(92)80078-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- R B Miller
- Analytical Research Center, L.A.B. Bio-Research International Inc., Montreal, Quebec, Canada
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