Viagra Generics are medications that have the same qualitative and quantitative composition and the same pharmaceutical form as original Viagra. Bioequivalence has also been demonstrated through extensive bioavailability testing. It is used to treat erectile dysfunction, which is the inability to maintain or achieve an erection. Like the original, generic Viagra contains the active ingredient sildenafil citrate, a phosphodiesterase type 5 inhibitor. The patent on this substance expired in many Western European countries in 2013, allowing the use of sildenafil citrate in generic medicines.
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