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Brand names: Viagra, Revatio

Generic names: Sildenafil citrate

Viagra (sildenafil) is often recommended for men unable to get an erection sufficient for having sex. Viagra does not cause erection even after 30 minutes unless you are sexually stimulated. Without this important factor you may not be able to get an erection at all. However, in most cases Viagra does make men taking it more sensitive to all kinds of stimulation – so it may take you less time to get sexually aroused. Certain health conditions you have may prevent you from safely taking this medicine. Therefore, it’s important that you tell your health care provider about any of the following health conditions if you have ever been diagnosed with: Peyronie’s disease, chest pain, eye disease such as retinitis pigmentosa, high cholesterol or blood circulation problems, bleeding disorder, blood cell problems, heart attack, high or low blood pressure, stomach ulcer, heart, kidney, or liver disease, stroke, irregular heartbeat. You must not take Viagra and have sex if your health care provider told you to refrain from sexual activity due to health reasons. If you have sex anyway this may put additional strain on your heart and can lead to such symptoms as nausea, chest pain and dizziness when having sex. Make sure you report these symptoms to your health care provider as soon as possible. Sudden loss of vision or hearing can be experienced by some patients taking this medicine for erectile dysfunction, although such cases are very rare. The sooner you report any of these two symptoms the bigger your chances are.