Generic Viagra

Sildenafil, sold under the brand name Viagra, is a popular and fast-acting oral medication used to treat erectile dysfunction (ED). It works by increasing blood flow to the penis, which helps to achieve and maintain an erection when sexually stimulated. It is a phosphodiesterase type 5 (PDE5) inhibitor. The typical dose is 50 mg, taken about an hour before sexual activity, but it can range from 25 mg to 100 mg.