Generic Viagra Sildenafil 25mg Cenforce x 50/100/200/500 tablets

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Generic Viagra Sildenafil 25mg Cenforce

Sildenafil, sold under the brand name Viagra among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. It is unclear if it is effective for treating sexual dysfunction in women. It is taken by mouth or by injection into a vein. Onset is typically within 20 minutes and lasts for about 2 hours. Common side effects include headaches, heartburn, and flushed skin. Caution is advised in those with cardiovascular disease. Rare but serious side effects include a prolonged erection that can lead to damage to the penis, vision problems, and hearing loss. Sildenafil should not be taken by people on nitrates such as nitroglycerin, as this may result in a serious drop in blood pressure. Sildenafil should not be taken within four hours of taking an alpha one antagonist. Sildenafil acts by blocking phosphodiesterase 5, an enzyme that promotes breakdown of cGMP, which regulates blood flow in the penis. It requires sexual arousal, however, to work.