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Todorovic MS, Frey K, Swarm RA, Bottros M, Rao L, Tallchief D, Kraus K, Meacham K, Bakos K, Zang X, Lee JB, Kagan L, Haroutounian S. Prediction of Individual Analgesic Response to Intravenous Lidocaine in Painful Diabetic Peripheral Neuropathy: A Randomized, Placebo-controlled, Crossover Trial. Clin J Pain 2021; 38:65-76. [PMID: 34723864 PMCID: PMC8727500 DOI: 10.1097/ajp.0000000000001001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 07/19/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVES Intravenous lidocaine can alleviate painful diabetic peripheral neuropathy (DPN) in some patients. Whether quantitative sensory testing (QST) can identify treatment responders has not been prospectively tested. MATERIALS AND METHODS This was a prospective, randomized, double-blind, crossover, placebo-controlled trial comparing intravenous lidocaine to normal saline (placebo) for painful DPN. Thirty-four participants with painful DPN were enrolled and administered intravenous lidocaine (5 mg/kg ideal body weight) or placebo as a 40-minute infusion, after a battery of QST parameters were tested on the dorsal foot, with a 3-week washout period between infusions. RESULTS Thirty-one participants completed both study sessions and were included in the final analysis. Lidocaine resulted in a 51% pain reduction 60 to 120 minutes after infusion initiation, as assessed on a 0 to 10 numerical rating scale, while placebo resulted in a 33.5% pain reduction (difference=17.6%, 95% confidence interval [CI], 1.9%-33.3%, P=0.03). Neither mechanical pain threshold, heat pain threshold, or any of the other measured QST parameters predicted the response to treatment. Lidocaine administration reduced mean Neuropathic Pain Symptom Inventory paresthesia/dysesthesia scores when compared with placebo by 1.29 points (95% CI, -2.03 to -0.55, P=0.001), and paroxysmal pain scores by 0.84 points (95% CI, -1.62 to -0.56, P=0.04), without significant changes in burning, pressing or evoked pain subscores. DISCUSSION While some participants reported therapeutic benefit from lidocaine administration, QST measures alone were not predictive of response to treatment. Further studies, powered to test more complex phenotypic interactions, are required to identify reliable predictors of response to pharmacotherapy in patients with DPN.
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Affiliation(s)
| | - Karen Frey
- Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO, USA, 63110
| | - Robert A. Swarm
- Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO, USA, 63110
- Washington University Pain Center, St Louis, MO, USA, 63110
| | - Michael Bottros
- Department of Anesthesiology, Keck School of Medicine of USC, Los Angeles, CA, 90033
| | - Lesley Rao
- Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO, USA, 63110
- Washington University Pain Center, St Louis, MO, USA, 63110
| | - Danielle Tallchief
- Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO, USA, 63110
| | - Kristin Kraus
- Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO, USA, 63110
| | - Kathleen Meacham
- Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO, USA, 63110
- Washington University Pain Center, St Louis, MO, USA, 63110
| | - Kristopher Bakos
- Investigational Drug Service, Department of Pharmacy, Barnes-Jewish Hospital, Saint Louis, MO, USA
| | - Xiaowei Zang
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, NJ, USA, 08854
| | - Jong Bong Lee
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, NJ, USA, 08854
| | - Leonid Kagan
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, NJ, USA, 08854
- Center of Excellence for Pharmaceutical Translational Research and Education, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, NJ, USA, 08854
| | - Simon Haroutounian
- Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO, USA, 63110
- Washington University Pain Center, St Louis, MO, USA, 63110
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Purgat K, Borowczyk K, Zakrzewski R, Głowacki R, Kubalczyk P. Determination of nikethamide by micellar electrokinetic chromatography. Biomed Chromatogr 2019; 33:e4571. [PMID: 31062390 DOI: 10.1002/bmc.4571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 04/15/2019] [Accepted: 04/30/2019] [Indexed: 11/06/2022]
Abstract
A simple, fast, sensitive and reproducible micellar electrokinetic chromatography (MEKC)-UV method for the determination of nikethamide (NKD) in human urine and pharmaceutical formulation has been developed and validated. The method exhibits high trueness, good precision, short analysis time and low reagent consumption. NKD is an organic compound belonging to the psychoactive stimulants used as an analeptic drugs. The proposed analytical procedure consists of few steps: dilution of urine or drug in distilled water, centrifugation for 2 min (12,000g), separation by MEKC and ultraviolet-absorbance detection of NKD at 260 nm. The background electrolyte used was 0.035 mol/L pH 9 borate buffer with the addition of 0.05 mol/L sodium dodecyl sulfate and 6.5% ACN. Effective separation was achieved within 5.5 min under a voltage of 21 kV (~90 μA) using a standard fused-silica capillary (effective length 51 cm, 75 μm i.d.). The determined limit of detection for NKD in urine was 1 μmol/L (0.18 μg/mL). The calibration curve obtained for NKD in urine showed linearity in the range 4-280 μmol/L (0.71-49.90 μg/mL), with R2 0.9998. The RSD of the points of the calibration curve varied from 5.4 to 9.5%. The analytical procedure was successfully applied to analysis of pharmaceutical formulation and spiked urine samples from healthy volunteers.
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Affiliation(s)
- Krystian Purgat
- Department of Environmental Chemistry, Faculty of Łódź, University of Łódź, Łódź, Poland
| | - Kamila Borowczyk
- Department of Environmental Chemistry, Faculty of Łódź, University of Łódź, Łódź, Poland
| | - Robert Zakrzewski
- Department of Environmental Chemistry, Faculty of Łódź, University of Łódź, Łódź, Poland
| | - Rafał Głowacki
- Department of Environmental Chemistry, Faculty of Łódź, University of Łódź, Łódź, Poland
| | - Paweł Kubalczyk
- Department of Environmental Chemistry, Faculty of Łódź, University of Łódź, Łódź, Poland
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Al Nebaihi HM, Primrose M, Green JS, Brocks DR. A High-Performance Liquid Chromatography Assay Method for the Determination of Lidocaine in Human Serum. Pharmaceutics 2017; 9:pharmaceutics9040052. [PMID: 29156554 PMCID: PMC5750658 DOI: 10.3390/pharmaceutics9040052] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 10/13/2017] [Accepted: 11/15/2017] [Indexed: 11/20/2022] Open
Abstract
Here we report on the development of a selective and sensitive high-performance liquid chromatographic method for the determination of lidocaine in human serum. The extraction of lidocaine and procainamide (internal standard) from serum (0.25 mL) was achieved using diethyl ether under alkaline conditions. After liquid–liquid extraction, the separation of analytes was accomplished using reverse phase extraction. The mobile phase, a combination of acetonitrile and monobasic potassium phosphate, was pumped isocratically through a C18 analytical column. The ultraviolet (UV) wavelength was at 277 nm for the internal standard, and subsequently changed to 210 for lidocaine. The assay exhibited excellent linearity (r2 > 0.999) in peak response over the concentration ranges of 50–5000 ng/mL lidocaine HCl in human serum. The mean absolute recoveries for 50 and 1000 ng/mL lidocaine HCl in serum using the present extraction procedure were 93.9 and 80.42%, respectively. The intra- and inter-day coefficients of variation in the serum were <15% at the lowest, and <12% at other concentrations, and the percent error values were less than 9%. The method displayed a high caliber of sensitivity and selectivity for monitoring therapeutic concentrations of lidocaine in human serum.
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Affiliation(s)
- Hamdah M Al Nebaihi
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB T6G 2E1, Canada.
| | - Matthew Primrose
- Department of Anesthesiology and Pain Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB T6G 2B7, Canada.
| | - James S Green
- Department of Anesthesiology and Pain Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB T6G 2B7, Canada.
| | - Dion R Brocks
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB T6G 2E1, Canada.
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Busardò FP, Tritapepe L, Montana A, Indorato F, Zaami S, Romano G. A fatal accidental subarachnoid injection of lidocaine and levobupivacaine during a lumbar paravertebral block. Forensic Sci Int 2015; 256:17-20. [PMID: 26332046 DOI: 10.1016/j.forsciint.2015.07.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 06/13/2015] [Accepted: 07/07/2015] [Indexed: 12/01/2022]
Affiliation(s)
- Francesco Paolo Busardò
- Department of Anatomical, Histological, Forensic and Orthopaedic Sciences, Sapienza University of Rome, Viale Regina Elena 336, 00161 Rome, Italy.
| | - Luigi Tritapepe
- Department of Anesthesiology and Intensive Care, Sapienza University, Rome, Italy
| | - Angelo Montana
- Department "G.F. Ingrassia", Laboratory of Forensic Toxicology, University of Catania, Italy
| | - Francesca Indorato
- Department "G.F. Ingrassia", Laboratory of Forensic Toxicology, University of Catania, Italy
| | - Simona Zaami
- Department of Anatomical, Histological, Forensic and Orthopaedic Sciences, Sapienza University of Rome, Viale Regina Elena 336, 00161 Rome, Italy
| | - Guido Romano
- Department "G.F. Ingrassia", Laboratory of Forensic Toxicology, University of Catania, Italy
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Validation of a thin-layer chromatography for the determination of hydrocortisone acetate and lidocaine in a pharmaceutical preparation. ScientificWorldJournal 2014; 2014:107879. [PMID: 24526880 PMCID: PMC3913387 DOI: 10.1155/2014/107879] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Accepted: 12/16/2013] [Indexed: 12/04/2022] Open
Abstract
A new specific, precise, accurate, and robust TLC-densitometry has been developed for the simultaneous determination of hydrocortisone acetate and lidocaine hydrochloride in combined pharmaceutical formulation. The chromatographic analysis was carried out using a mobile phase consisting of chloroform + acetone + ammonia (25%) in volume composition 8 : 2 : 0.1 and silica gel 60F254 plates. Densitometric detection was performed in UV at wavelengths 200 nm and 250 nm, respectively, for lidocaine hydrochloride and hydrocortisone acetate. The validation of the proposed method was performed in terms of specificity, linearity, limit of detection (LOD), limit of quantification (LOQ), precision, accuracy, and robustness. The applied TLC procedure is linear in hydrocortisone acetate concentration range of 3.75 ÷ 12.50 μg·spot−1, and from 1.00 ÷ 2.50 μg·spot−1 for lidocaine hydrochloride. The developed method was found to be accurate (the value of the coefficient of variation CV [%] is less than 3%), precise (CV [%] is less than 2%), specific, and robust. LOQ of hydrocortisone acetate is 0.198 μg·spot−1 and LOD is 0.066 μg·spot−1. LOQ and LOD values for lidocaine hydrochloride are 0.270 and 0.090 μg·spot−1, respectively. The assay value of both bioactive substances is consistent with the limits recommended by Pharmacopoeia.
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Caris JA, Silva BJG, Moisés ECD, Lanchote VL, Queiroz MEC. Automated analysis of lidocaine and its metabolite in plasma by in-tube solid-phase microextraction coupled with LC-UV for pharmacokinetic study. J Sep Sci 2012; 35:734-41. [DOI: 10.1002/jssc.201100872] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Revised: 11/16/2011] [Accepted: 12/14/2011] [Indexed: 11/09/2022]
Affiliation(s)
- Juciene Aparecida Caris
- Departamento de Química, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto; Universidade de São Paulo; São Paulo; Brazil
| | - Bruno José Gonçalves Silva
- Departamento de Química, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto; Universidade de São Paulo; São Paulo; Brazil
| | | | - Vera Lúcia Lanchote
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto; Universidade de São Paulo; São Paulo; Brazil
| | - Maria Eugênia Costa Queiroz
- Departamento de Química, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto; Universidade de São Paulo; São Paulo; Brazil
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