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Brand names: Viagra, Revatio

Generic names: Sildenafil citrate

Viagra (sildenafil citrate) has been specially designed to suit the needs of men unwilling to give up on their sex life because of erectile dysfunction. It takes Viagra from 30 to 60 minutes to act, but in some cases it can be even faster – everything depends on the patient. Once you have taken the tablet its effects are likely to last for up to 4 hours during which you can have sex. However, it’s important to keep in mind that the most powerful effects of Viagra can be experienced during the first couple of hours, as then the drug begins to lose its efficiency gradually.

Report to your health care provider any drugs you are currently using. The following medicines should be mentioned to make sure you are prescribed the right dosage: alpha blockers (alfuzosin, doxazosin, prazosin, tamsulosin, and terazosin), amlodipine, antifungals (itraconazole, ketoconazole), anticoagulants (warfarin), barbiturates (butalbital, secobarbital), beta blockers (atenolol, labetalol, metoprolol, nadolol, propranolol, bosentan), cimetidine, efavirenz, erythromycin, HIV protease inhibitors (amprenavir, atazanavir, darunavir, fosamprenavir, indinavir, lopinavir, nelfinavir, ritonavir, saquinavir, and tipranavir), other erectile dysfunction treatments, medications for high blood pressure, seizure medications (carbamazepine, phenobarbital, phenytoin), rifabutin and rifampin. If you are taking any of the medications mentioned above your dose may need to be adjusted or your doctor will monitor your condition more closely.