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LC determination of diphemanil methylsulfate: application to stability study of stored pharmaceutical formulations. 2002

J J Houri, and G Gouaillard, and V Acar, and M D Le Hoang, and D Pradeau, and F Guyon
Pharmacie Centrale des Hôpitaux de Paris, Agence Générale des Approvisionnements Médicaux, Service des Affaires Réglementaires, 7, rue du Fer à Moulin, 75005, Paris, France. jea-jacques.houri@pch.ap-hop-paris.fr

Diphemanil methylsulfate (DMS) is a synthetic antimuscarinic agent classically used in infants for vagal hypertonia-related symptoms. A normal-phase, isocratic liquid chromatographic method was developed for the quantitative determination of DMS in bulk drugs and in pharmaceutical forms. The method has been completely validated and robustness of this method has been studied. The limit of detection (LOD) for DMS impurities namely, impurity 1 and 2 were found to be 11 and 46 ng/ml. The limit of quantitation (LOQ) was found to be 49 and 139 ng/ml for impurity 1 and 2, respectively. The stability studies have been performed for 2 and 10 mg DMS tablets subjected at various temperatures: 25 degrees C (long term storage condition) and 40 degrees C (accelerated storage condition) for 18 and 6 months, respectively. At 25 degrees C, the samples were found to be stable for the study period. At 40 degrees C, 2 and 10 mg DMS tablets showed degradation up to 5 and 10% over a 6-month period.

UI MeSH Term Description Entries
D010880 Piperidines A family of hexahydropyridines.
D002851 Chromatography, High Pressure Liquid Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed. Chromatography, High Performance Liquid,Chromatography, High Speed Liquid,Chromatography, Liquid, High Pressure,HPLC,High Performance Liquid Chromatography,High-Performance Liquid Chromatography,UPLC,Ultra Performance Liquid Chromatography,Chromatography, High-Performance Liquid,High-Performance Liquid Chromatographies,Liquid Chromatography, High-Performance
D004355 Drug Stability The chemical and physical integrity of a pharmaceutical product. Drug Shelf Life,Drugs Shelf Lives,Shelf Life, Drugs,Drug Stabilities,Drugs Shelf Life,Drugs Shelf Live,Life, Drugs Shelf,Shelf Life, Drug,Shelf Live, Drugs,Shelf Lives, Drugs
D004356 Drug Storage The process of keeping pharmaceutical products in an appropriate location. Drug Storages,Storage, Drug,Storages, Drug
D000465 Algorithms A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task. Algorithm
D013607 Tablets Solid dosage forms, of varying weight, size, and shape, which may be molded or compressed, and which contain a medicinal substance in pure or diluted form. (Dorland, 28th ed) Tablet
D013696 Temperature The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms. Temperatures
D013997 Time Factors Elements of limited time intervals, contributing to particular results or situations. Time Series,Factor, Time,Time Factor
D015203 Reproducibility of Results The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results. Reliability and Validity,Reliability of Result,Reproducibility Of Result,Reproducibility of Finding,Validity of Result,Validity of Results,Face Validity,Reliability (Epidemiology),Reliability of Results,Reproducibility of Findings,Test-Retest Reliability,Validity (Epidemiology),Finding Reproducibilities,Finding Reproducibility,Of Result, Reproducibility,Of Results, Reproducibility,Reliabilities, Test-Retest,Reliability, Test-Retest,Result Reliabilities,Result Reliability,Result Validities,Result Validity,Result, Reproducibility Of,Results, Reproducibility Of,Test Retest Reliability,Validity and Reliability,Validity, Face
D018727 Muscarinic Antagonists Drugs that bind to but do not activate MUSCARINIC RECEPTORS, thereby blocking the actions of endogenous ACETYLCHOLINE or exogenous agonists. Muscarinic antagonists have widespread effects including actions on the iris and ciliary muscle of the eye, the heart and blood vessels, secretions of the respiratory tract, GI system, and salivary glands, GI motility, urinary bladder tone, and the central nervous system. Antimuscarinic,Antimuscarinic Agent,Antimuscarinic Agents,Cholinergic Muscarinic Antagonist,Muscarinic Antagonist,Antimuscarinics,Cholinergic Muscarinic Antagonists,Agent, Antimuscarinic,Agents, Antimuscarinic,Antagonist, Cholinergic Muscarinic,Antagonist, Muscarinic,Antagonists, Cholinergic Muscarinic,Antagonists, Muscarinic,Muscarinic Antagonist, Cholinergic,Muscarinic Antagonists, Cholinergic

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