A drug called sildenafil is marketed under several names, including Viagra, and is used to treat pulmonary arterial hypertension and erectile dysfunction. It's unknown if treating female sexual dysfunction with it is beneficial. Cenforce 100 vs viagra is administered intravenously or orally. The onset usually occurs in 20 minutes and lasts for approximately two hours. Heartburn, flushed skin, and headaches are common adverse effects. In patients with cardiovascular problems, caution is suggested. A prolonged erection (priapism), which can cause damage to the penis, visual issues, and hearing loss, are uncommon but potentially dangerous adverse effects. People using nitrates, such as nitroglycerin (glycerin trinitrate), shouldn't use sildenafil since it could cause a significant reduction in blood pressure. Sildenafil ought not to be used.