What Viagra is used for and how sildenafil treats erectile dysfunction.

Viagra is a medicine best known for treating erectile dysfunction (ED). The active ingredient in Viagra is sildenafil, which supports the physical process needed to get an erection when a person is sexually aroused.

Quick definition of Viagra

Viagra (sildenafil) is a PDE5 inhibitor a type of medicine that helps blood vessels relax and supports increased blood flow to penile tissue during arousal, making it easier to achieve and maintain an erection.

What Viagra is used for

The main use is erectile dysfunction, which can show up as:

ED can be occasional or ongoing. When it’s persistent, it may also be a sign you need a broader health check.

Who typically uses it (suitability overview)

Viagra is generally used by adults who:

Suitability depends on health history and medicines you already take.

What to expect (high-level)

Viagra usually:

If you want the “why” behind this: How Viagra Works and Why Viagra Needs Sexual Stimulation

Viagra vs sildenafil (naming clarity)

Viagra is the brand name; sildenafil is the generic name (same active ingredient).

Quick FAQs

Does Viagra cure ED permanently?
It treats symptoms during use; it doesn’t “cure” the underlying cause.

Is Viagra only for older men?
ED happens across ages; suitability depends on health and cause not age alone.