copyright medicines are a growing problem in both developing and industrialised countries.In general the evaluation of these medicines is limited to the here 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).The dissolution profiles were statistically compared to the ones of the genuine products using the f2-method and a comparison at each time point using the Cochran test.The results showed low equivalences between copyright and genuine products as well as higher variations around the mean dissolution value at the different time points caruso milk thistle for the copyright products.
Keywords: copyright, PDE-5 inhibitors, In vitro dissolution, f2-Method, Cochran test.