Carvedilol estudos de estabilidade e perfil de dissolução

Abstract

The aim of the present study was to evaluate the stability of the active principal ingredient of carvedilol, and the release of the drug in vitro, through studies of dissolution. In the stability study were used hydrolytic conditions of stress (in the acid, neutral and basic), oxidative (with hydrogen peroxide) and photolytic (under ultraviolet light). Later, assessed to the kinetics of degradation under different conditions by the liquid chromatography (LC) method. The liquid chromatography coupled with mass spectrometry (LC-MS/MS) method was developed and validated to indicate the molecular mass of formed compounds. The sample tablets containing carvedilol were subjected to accelerated study of stability under conditions of controlled temperature and relative humidity (40 °C ± 2 °C e 75% ± 5 %, respectively) for six months and then evaluated by LC-MS/MS and ultraviolet spectrophotometry methods. In order to assess the in vitro release of the drug, the conditions to be used in the dissolution test were tested during development and then optimized during validation. Physico-chemical tests such as identification, weight variation, hardness, friability, assay, content uniformity, time of disintegration and dissolution were evaluated to check the possible replacement between samples of tablets containing carvedilol available on the market.