I tried 50mg viagra a couple months ago. About 45 minutes later while I was on the road to go see my hookup for the night, my penis got hard so fast, it bout hit me in the face. I started freaking out because it happened so much faster and harder (giggidy) than I expected and I started swerving on the road and shit, trying to adjust my pants so my penis didn't hurt as much. Definitely don't take that much right before going to the gym. You'll poke someone's eye out