Viagra.

Viagra (sildenafil) can be recommended if you have been diagnosed with erectile dysfunction and find it hard or impossible to maintain your erection for long enough to complete sexual intercourse. This drug works by dilating your blood vessels in the penis and preventing the blood from escaping back into the body too soon. You will need to talk to your health care provider if you take any drugs at the moment and are going to take them along with Viagra. The following medications are very important to report: bosentan, medications for high blood pressure, barbiturates, nevirapine, amlodipine, rifabutin, certain antifungals, erythromycin, beta blockers, cimetidine, anticoagulants, alpha blockers, other erectile dysfunction meds, seizure medications, rifampin, efavirenz, or HIV protease inhibitors. Interactions between the drugs mentioned and Viagra can reduce the effectiveness of your treatment. Tell your health care provider if your mild side effects that are possible at the beginning of the treatment (changes in color vision, headache, light sensitivity, heartburn, diarrhea, numbness, burning, or tingling, muscle aches, flushing, insomnia, and nosebleeds) do not go away for a long time and get severe.