Like all medicines, Viagra brand Pfizer (active ingredient is sildenafil citrate) can cause some pharmaceutical drug side effects. Most Sildenafil citrate drug side effects occure at higher dosage. It's best to start at....
I am a 26 yo male and about a year ago I started experiencing sexual problems. It got so severe that i feel like 99% impotent all the time. I am on antidepressants (celexa) .....