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Brand names: Viagra, Revatio

Generic names: Sildenafil citrate

Viagra (sildenafil citrate) can be recommended for cases of erectile dysfunction of any severity, no matter what they were caused by. The effects of Viagra are based on intensified blood flow to the penis. Corpora cavernosa – the two chambers of the penis expand when filled with blood. Viagra also prevents the muscles of the penis from constricting (this process leads to the outflow of the blood and the erection is lost). Therefore the patient can hold his erection for longer and complete sexual intercourse. Viagra will not cure your erectile dysfunction – it only treats this condition and you need to take it on the when needed basis. This means that the effects of Viagra are present only during some 4 hours after you have taken the dosage and you need to use this drug repeatedly (but not more than once every 24 hours) to achieve the result desired.

Viagra can be taken with some food or without, but make sure you avoid using it with meals high in fat as it will slow down the process of absorption. Unless you are using sildenafil for pulmonary arterial hypertension (PAH) you are unlikely to be on any kind of dosing schedule. Take Viagra as needed and do not exceed the dose recommended. Nitrate medicines (sprays, tablets, pastes, ointments, sublingual tablets and other forms) must not be combined with Viagra as a dangerous drop in blood pressure is possible. Make sure you tell your health care provider if you have taken any nitrates over the last couple of weeks. If you are not sure whether the medicines you are taking at the moment are nitrates consult your health care provider for more information.