Other uses for this medicine This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information. If you have certain health conditions or are taking certain medications, your doctor may tell you to take sildenafil less often. Follow the manufacturer’s directions to use and clean the oral syringe. The following nonprescription or herbal products may interact with sildenafil: cimetidine Tagamet HB , St. Alpha-blockers are sometimes prescribed for prostate problems or high blood pressure. Continue to take sildenafil even if you feel well.Viagra is a brand-name drug manufactured by Pfizer. Sildenafil citrate is the generic version. The average Viagra cost is quite expensive at about $ for 1, MG Tablet of Viagra. However, you can use a Viagra coupon below to pay a reduced price of $ for 30, mg Tablet of generic Viagra at participating pharmacies near you. Brand Names: Revatio Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). Learn more about Viagra oral. 1 This is a generic drug. Even if this drug. VIAGRA is available by prescription only in 25 mg, 50 mg, and mg tablets. Patients should always ask their doctors for medical advice about adverse events. You are encouraged to report adverse events related to Viatris products by calling 1 .