DLD pretty much nailed it. I have prescreiptions for both. Im pretty young but got in an accident and have used them both with great results. Viagra def gives you a more intense erection, almost like its popping out of the skin. Rigid. However this only lasts a few hours, so you have to know you are going to smash when you take it. Cialis gives a similar erection, but not as intense, during the first four hours as well, even though it lasts longer up to a couple days, and maybe even longer with placebo effect, it is worthless to me after the first few hours like viagra. Once I get that Viagra erection everything else doesnt seem good enough. I did notice that when I take cialis my cock is fuller and hangs lower for almost 5 days afterwards. I also feel that maybe switching back and forth between viagra, cialis, and LEVITRA, may also keep your cock from getting used to just one of those medications alone. If its just for workouts cialis might be more economic because you may be able to recieve its benefits for a few workouts as opposed to just one for viagra, although i think viagra is cheaper, much cheaper for me at least. I havent used any of these for my workouts as I like to save them for smashing, but I would imagine it would be a wonderful workout and maybe i will try to incorporate them into my routine.
oh as for side effects, Ive never really noticed them or cared because I took it at night in the dark and no one really can see any of the flushing etc. I doubt anyone is going to check you out during or after your Penis Enlargement routine so you should be good. Maybe a little stuffy but thats about it. You can feel it kick in with a little elevated blood pressure in your head (real head not little head) after about 30-45 mins.