Common Brand (S): Viagra Generic Name (S): sildenafil Uses Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED).Remove the cap by pushing it down and twisting it counter-clockwise. Use the oral syringe provided with your medication to measure and take your dose. Remove the syringe from the bottle. Your doctor will tell you not to take sildenafil if you are taking street drugs containing nitrates. If you are taking sildenafil to treat erectile dysfunction, you should know that it does not cure erectile dysfunction or increase sexual desire. What should I do if I forget a dose?Sildenafil under the name Viagra is used to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial . Common Brand (S): Viagra Generic Name (S): sildenafil Uses Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). Sildenafil is in a class of medications called phosphodiesterase (PDE) inhibitors. Sildenafil treats erectile dysfunction by increasing blood flow to the penis during sexual .Sildenafil usually should not be taken more than once every 24 hours. John’s wort. If we combine this information with your protected health information, we will treat all of that information as protected health information and will only use or disclose that information as set forth in our notice of privacy practices. Sildenafil Viagra is used to treat erectile dysfunction impotence; inability to get or keep an erection in men. Other uses for this medicine This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.