Sildenafil

Urinary and men's health

Also known as Viagra

Sildenafil treats erectile dysfunction by improving blood flow where it counts. It doesn't create desire — it works with arousal that's already there. Take it about 30 to 60 minutes before intimacy, and no more than one dose in a day. The number one rule: never take it with nitrates like nitroglycerin or isosorbide — the combination can crash your blood pressure dangerously.

How to take it

When

About 30-60 minutes before intimacy. One dose per day, maximum.

Food

A heavy, fatty meal can slow it down. It works faster on a lighter stomach.

Avoid

NEVER with nitrates (nitroglycerin, isosorbide) — dangerous blood pressure crash. Caution with alpha blockers like tamsulosin too.

Good to know

Chest pain during sex? Call emergency services and tell them you took sildenafil.

Missed a dose?

It's taken only when you need it, so there's no missed dose to worry about. Just never take more than one dose in 24 hours.

Common side effects

Headache
Flushing (a warm, red face)
Stuffy nose
Upset stomach
A temporary bluish tint to vision

Call a doctor if

An erection lasting more than 4 hours — this is an emergency; permanent damage is possible
Sudden vision loss in one or both eyes — stop and get help now
Sudden hearing loss or ringing in the ears — stop and get help now
Chest pain during or after sex — call emergency services and tell them you took it

Educational only. This summary is drawn from public FDA labeling and MedlinePlus and simplified for readability. Your prescription label and your pharmacist always come first — doses and instructions vary from person to person.