I have tried both the generic and non generic Viagra since my RALP last June in the 100mg size. My doctor gave free samples of the US Viagra. I tried the 30 day Cialis and all I got was terrible back aches. Trimix injections is the only thing so far that gets me close enough for sexual penetration.
Both the generic Viagra from India and the US non generic worked for me about the same with the same side effects. I get about a 40% erection with both with lots of stimulation. I have noticed the India generic does produce more of the blue vision but that is not a big problem so far.