Viagra Generic

viagra generic - http://viagralim.com/. [3] Onset is typically within 20 minutes and lasts for about 2 hours. [3] It also results in dilation of the blood vessels in the lungs. [3] It requires sexual arousal, however, to work. [3] Sildenafil should not be taken by people on nitrates such as nitroglycerin (glycerin trinitrate), as this may result in a serious drop in blood pressure. Sildenafil, sold as the brand name Viagra among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension.

[3] It is taken by mouth or injection into a vein. [3] Caution is advised in those with cardiovascular disease. [3] It is unclear if it is effective for treating sexual dysfunction in women. [3] Sildenafil acts by blocking phosphodiesterase 5 (PDE5), an enzyme that promotes breakdown of cGMP, which regulates blood flow in the penis. [3] Rare but serious side effects include a prolonged erection that can lead to damage to the penis, vision problems, and hearing loss.

[3] Common side effects include headaches, heartburn, and flushed skin.