Viagra (sildenafil) is a prescription anti-impotence drug that works by dilating the blood vessels in the penis and causing an erection to occur and last long enough for the patient to have sex. If you are allergic to any drugs this should be reported to your health care provider before getting a prescription. This can affect the dosage you will be prescribed, as well as other recommendations of your health care provider. Whether any other medicines you are taking at the moment have been prescribed to you or you purchased them without a prescription make sure you report to your health care provider the fact of taking erythromycin, efavirenz, other erectile dysfunction treatment drugs, barbiturates, amlodipine, bosentan, anticoagulants, cimetidine, high blood pressure medications, nevirapine, phenobarbital, rifabutin, medcines for seizures, tamsulosin, HIV protease inhibitors, antifungals (itraconazole, ketoconazole), beta blockers, phenytoin, alpha blockers (doxazosin, prazosin, rifampin, alfuzosin) or carbamazepine. If you are taking any other medications and they are not mentioned here please make sure you also report them to your doctor to avoid drug interactions. Although Viagra is not intended for women (there is a special kind of Viagra made specially for females though), if you are a woman taking Viagra make sure you tell your health care provider if you are pregnant of breastfeeding to avoid health effects for the baby.
Brand names: Viagra, Revatio
Generic names: Sildenafil citrate
