Viagra (sildenafil) is a brand-name prescription drug that’s used to treat erectile dysfunction (ED). Learn about side effects, warnings, dosage, and more.Although the Food and Drug Administration has banned many of these products, some potentially dangerous erectile dysfunction remedies remain on the market. It added further: “As a matter of policy and sound statutory interpretation, patentees cannot be allowed to ‘game’ the system in this way. If you are a Mayo Clinic patient, this could include protected health information. It was initially studied for use in hypertension high blood pressure and angina pectoris a symptom of ischaemic heart disease. You can take this medicine with or without food 30 minutes before sex, depending on the dose.Viagra can interact with erythromycin (Ery-Tab), which is another antibiotic. Viagra can also interact with certain antifungal drugs, including ketoconazole and itraconazole (Sporanox, Tolsura). AdEnjoy Greater Libido & Performance. Fast Express ries: Various · Best Sellers · Aphrodisiacs · All Products · Ubulawu Dream Herbs. AdDiscover UltraCore’s Top Male Enhancement Pill. Male UltraCore enhancement pill is scientifically proven to deliver breakthrough ry Leaders · Watch Video · Fully Equipped · Custom Formulation.Side effects Side effects of oral ED medicines are often mild. Store mixed oral liquid in the refrigerator. Dietary supplements for erectile dysfunction: A natural treatment for ED? The typicaldose of Viagra is 50 mg. However, the dose is usually not more than 80 mg 3 times a day.