Preparation of Combination Tablet Containing Lisinopril (10mg) / Hydrochlorothiazide (12.5mg) and Characterization and Stability Studies

In modern clinical practice, combination fixed - dose tablets have become a baseline for effective therapy in many clinical conditions. The Hydrochlorothiazide (Hctz) (12.5mg) / Lisinopril (Lis) (10 mg) tablet is a combination drug for treatment of hypertension. In this study, the tablets were prepared by wet granulation method and characterized in terms of weight variation, hardness, friability, disintegration time, dissolution and stability. A high-performance liquid-chromatographic method (HPLC) was used to assay Hctz and Lis in the prepared tablets. Amongst different formulations, WG14 was found to be the best for product development based on both physicochemical and stability results. Pharmaceutical characteristics of the tablets were compared with the Innovator tablet 1A-Pharma (Germany).