Medicines that you take by mouth are called oral medicines. You can take it in a small dose daily or in a larger dose as needed. It might work longer if you have mild to moderate erectile dysfunction. This boosts blood flow and helps you get an erection from sexual activity. These include a heart attack, stroke or a serious heart rhythm disorder in the past six months. Common ones include: Flushing of the skin. 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.Sildenafil (Viagra, Revatio) is a moderately priced drug used to treat erection problems in is also used to treat pulmonary arterial hypertension, a serious heart and lung . Stop taking Viagra and get emergency medical help if you have: heart attack symptoms–chest pain or pressure, pain spreading to your jaw or shoulder, nausea, sweating;. The Savings Offer and Program expire on 12/31/ For further information, call , visit , or write: Viatris Inc., P.O. Box , Mission, KS .

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