Revatio

Sildenafil, sold under the brand name Viagra among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension.[8][4] It is unclear if it is effective for treating sexual dysfunction in women.[8] It is taken by mouth or by injection into a vein.[8] Onset is typically within 20 minutes and lasts for about 2 hours.[8] Common side effects include headaches, heartburn, and flushed sk... [wikipedia]