In some patients, the use of VIAGRA with alpha-blockers can lead to a drop in blood pressure or to fainting medicines called HIV protease inhibitors, such as ritonavir Norvir , indinavir sulfate Crixivan , saquinavir Fortovase or Invirase , or atazanavir sulfate Reyataz some types of oral antifungal medicines, such as ketoconazole Nizoral and itraconazole Sporanox some types of antibiotics, such as clarithromycin Biaxin , telithromycin Ketek , or erythromycin other medicines that treat high blood pressure other medicines or treatments for ED VIAGRA contains sildenafil, which is the same medicine found in another drug called REVATIO. Please expect up to 4 to 6 weeks for reimbursement. Take sildenafil up to 4 hours before you want to have sex. The usual dose is 50mg, when you need it. Side Effects Along with its needed effects, a medicine may cause some unwanted effects. · Abnormal penis, including a curved penis or birth defects of the penis—Chance of problems occurring may be increased and this medicine should be used with caution in these patients. Angina (severe chest pain), unstable or. Arrhythmia (irregular heartbeat, within the last 6 months) or. The Savings Offer and Program expire on 12/31/ For further information, call , visit test1.ru, or write: Viatris Inc., P.O. Box , Mission, KS See risks & benefits. Learn more about what VIAGRA® (sildenafil citrate), a prescription treatment for ED. AdBrowse & discover thousands of brands. Read customer reviews & find best sellers. Free shipping on qualified orders. Free, easy returns on millions of items.1M+ visitors in the past month.