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A consistent inability to sustain an erection sufficient for sexual intercourse. Also commonly known as impotence. Medically, the term erectile dysfunction is used to differentiate impotence from other problems that interfere with sexual intercourse. Viagra and certain other medications. Because Viagra may interact with certain other medications, your doctor may recommend that you don t take it with these drugs. Or they may prescribe a dose of Viagra that s lower than usual. Examples include: certain antibiotics, such as erythromycin (Eryc, Ery-tab) and clarithromycin viagra other names Sildenafil is the active ingredient in Viagra, a drug for erectile dysfunction and pulmonary hypertension. Learn about other brand names, drug classes, uses and chemical structure of sildenafil. See more If you take sildenafil for pulmonary arterial hypertension, do not take Viagra or other PDE5 inhibitors, including tadalafil (Cialis ) or vardenafil (Levitra ). Viagra also contains sildenafil. If you take too much sildenafil or take it together with these medicines, the chance for side effects will be higher. Hims offers a wide variety of Viagra doses and other ED medications. You can also see how buying different dosages and quantities and buying brand-name Viagra versus generic Viagra, for

Because patients with recent heart attacks or stroke, heart pains (angina), heart failure, uncontrolled blood pressure or uncontrolled irregular heart beats, severe liver disease, and retinal eye cialis and blindness Within 7 days of ingesting 20 mg of tadalafil, he began to experience a generalised headache and blurring of vision associated with тАШblue areasтАЩ and flashing lights in the visual field of the The erectile dysfunction drugs sildenafil, vardenafil, and tadalafil have recently been associated with non-arteritic anterior ischemic optic neuropathy (NAION).