Viagra is a medication used to treat erectile dysfunction (ED) in men. It is a phosphodiesterase type 5 (PDE5) inhibitor, which means it works by relaxing the muscles in the blood vessels of the penis, allowing more blood to flow into the penis and causing an erection. Viagra is available in tablet form and is taken orally.
Viagra is a safe and effective medication for most men. However, it is important to note that it can cause side effects, such as headache, flushing, and indigestion. Viagra should not be taken by men who are taking nitrates, as this can cause a dangerous drop in blood pressure.
