What are the generic versions of Viagra
['Sildenafil citrate (SIL)', 'generic sildenafil (Unison Laboratories, Thailand) was proved to have the same bioequivalent as in the original formula. The authors conducted a 12-week case series to study the efficacy and safety of Elonza (generic sildenafil)', 'Viagra tablets or generic versions containing sildenafil citrate']
['Sildenafil Citrate and Elonza in Thailand are the generic versions of Viagra']
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