QUALITY CONTROL MEASUREMENT AND IN VITRO BIOEQUIVALENCE OF VALSARTAN AND ATENOLOL TABLETS MARKETED IN UKRAINE

Abstract

Background. The urgent issue of hypertension is determined by its high population incidence, significant burden of the disease, risk of disability and impact on life expectancy. Rational combinations of drugs of different pharmacological groups in case of ineffectiveness of monotherapy to achieve the clinical effect of pharmacotherapy are clearly recommended in the world and national recommendations for diagnosis and treatment of hypertension. Therefore, innovative pharmaceutical development of a combination of antihypertensive drugs and creation of domestic drugs with antihypertensive action is an urgent task of contemporary pharmacy.
 Objective. The aim of this study was to perform the quality control measurements and evaluation of dissolution tests for different brands of valsartan and atenolol tablets available in Ukraine. 
 Methods. The concentrations of valsartan and atenolol in samples (drug content and dissolution study) were determined by the proposed HPLC method. 
 Results. The results of the tests conducted for evaluation of the tablets were found to be in acceptable limits for all the selected brands. The correlation coefficient (R2) was 0.9991 and the regression equation was y=61.39x+0.3117. It has been established that the equivalence of dissolution profiles for all recommended dissolution media is observed (рН 1.2, 4.5, and 6.8) for the studied drugs. In all three dissolution media, the release rates of valsartan and atenolol of all dosage forms are more than 85% in 15 min. The dissolution profile of all the selected brands was within the standard limits and was acceptable.
 Conclusions. Analytical method development is an integral part of the quality control measurements and evaluation of dissolution tests. Our previously developed HPLC method is essential for quality control of a large number of samples in short time intervals. Therefore, the method developed by our group is suitable for a routine quality control analysis of any pharmaceutical preparation containing two tested drugs with the suggested chromatographic method advantages for checking quality during dissolution studies of their dosage forms.