The evaluation of valsartan biopharmaceutics properties.
No Thumbnail Available
Date
2020
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Background: Solubility, intestinal permeability and dissolution are the main factors that govern the rate and extent of drugs absorption and are directly related to bioavailability. Biopharmaceutics Classification System (BCS) is an important tool that uses in vitro results for comparison with bioavailability in vivo (biowaiver). Valsartan is widely used in the treatment of hypertension and shows different BCS classification in the literature (BCS class II or III). Objective: This work proposes the study of valsartan biopharmaceutics properties and its BCS classification. Method: High performance liquid chromatography (HPLC) method was developed and validated to quantify the drug in buffers pH 1.2, 4.5 and 6.8. Valsartan solubility was determined in these three different media using shake flask method and intrinsic dissolution rate. Evaluation of dissolution profile from coated tablets was conducted. Results: The low solubility (pH 1.2 and 4.5) and high solubility (pH 6.8) was observed for both solubility methods. Permeability data reported from literature showed that valsartan is a low permeability drug. Valsartan presented rapid release profile only in pH 6.8. Conclusion: We defined that valsartan is a class IV drug, in disagreement with what has been published so far. It is important to emphasize that the conditions considered here are the indicated to define the biopharmaceutics classification by regulatory agencies.
Description
Keywords
Biopharmaceutics classification system, Solubility, Permeability, Dissolution, Biowaiver
Citation
CASTRO, L. M. L. et al. The evaluation of valsartan biopharmaceutics properties. Current Drug Research Reviews, v. 12, p. 1-11, 2020. Disponível em: <http://www.eurekaselect.com/177319/article>. Acesso em: 10 fev. 2020.