copyright medicines are a growing problem in both developing and industrialised countries. In general the evaluation of these medicines is limited to the identification and the dosage of the active ingredients. In this study in vitro dissolution tests were conducted on two sets of copyright medicines containing PDE-5 inhibitors (sildenafil citrate and tadalafil). https://safeersappliancers.shop/product-category/hoover-axi-combined-hmnb6182dx5k-60cm-no-frost-fridge-freezer/