Comparative Evaluation of Certain Excipients and their Binary Blends for Direct Compression Oxytetracycline Hydrochloride Tablets

Abstract

Five direct compression excipients as well as their binary blends in ratios of 1:1, 1:3 and 3:1 were comparatively evaluated to compress oxytetracycline hydrochloride into tablets. With respect to the mechanical properties of the produced tablets, Avicel PH101, Celutab and STAR-x1500 in this order, were the most suitable single excipients for the production. The results showed that the incorporation of a second excipient in the formulation changes the physical standards of the produced antibiotic tablets. It was found that not only the type of the incorporated excipient is effective but also, its concentration in the formula. The investigation proved that Avicel/STAR-x1500 blends in all different ratios followed by some blends of celutab with Avicel or STAR-x1500 were the best blended excipients to produce satisfactory antibiotic tablets.