Sildenafil may cause side effects. Stop taking VIAGRA and call your healthcare provider right away if you have any sudden vision loss sudden hearing decrease or hearing loss. If you become pregnant while taking sildenafil, call your doctor. Answer: It depends on the person taking it and what their sexual habits are. If you experience chest pain, dizziness, or nausea during sex, seek immediate medical help. Neither Sildenafil nor drugs in the same class are appropriate or safe for women.Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Sildenafil (Liqrev, Revatio) is used to improve the ability to exercise in .  · Sildenafil under the name Viagra is used to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio, which is used to treat . The Savings Offer and Program expire on 12/31/ For further information, call , visit test1.ru, or write: Viatris Inc., P.O. Box , Mission, KS .