Viagra.

Viagra (sildenafil) has been specially designed for the treatment of male impotence (erectile dysfunction) that can affect men as young as in their twenties and can be caused by a wide range of factors. You can be taking Viagra as needed but not more often than every 24 hours. Make sure you do not start taking any other meds before discussing it with you doctor. It's important that you mention the following drugs to your doctor: imatinib, heart or blood pressure medications, HIV/AIDS medicines, diclofenac, rifampin, antifungal medications, enoxacin, bosentan, isoniazid, conivaptan, antibiotics, antidepressants, or cimetidine to prevent interactions from occurring. If you get headache, stuffy nose, upset stomach, warmth or redness in your face or chest, memory problems, or back pain – do not get worried, as those are normal reactions that can occur at the beginning of the treatment. More serious side effects are unlikely but sill possible and include irregular heartbeat, sudden vision loss, feeling light-headed, fainting, penis erection that is painful, swelling in your hands, ankles, or feet, sudden hearing loss, vision changes, shortness of breath, and chest pain.