Key facts about Viagra
What is Viagra?
Viagra is the brand name for sildenafil and is available as an oral tablet.
What dosages is Viagra available in?
Viagra is available as a 25 mg, 50 mg, and 100 mg oral tablet.
What is Viagra used for?
Viagra is a phosphodiesterase 5 (PDE-5) blocker that treats erectile dysfunction.
How does Viagra work?
Viagra is a phosphodiesterase-5 (PDE-5) inhibitor. PDE-5 is a protein in your body that breaks down the molecules that normally cause an erection. When it blocks PDE-5, sildenafil (Viagra) helps an erection occur by allowing certain muscles in the penis to relax and the penis to fill with blood.
How do I take Viagra?
The typical dose is to take 50 mg of Viagra by mouth, about 1 hour before sex, as needed. The maximum recommended dose is 100 mg. Don’t take Viagra more than once daily (at any dose).
Is it safe for me to take Viagra?
Viagra is a safe and effective treatment when used for FDA licensed indications. However, like all medications, they may give you unwanted side effects. You should always discuss potential side effects with your physician to ensure the medication is suitable and right for you. You should not use this medication if you are taking any organic nitrates.
Viagra Common Side Effects
Common side effects of Viagra:
- Headache
- Flushing
- Indigestion
- Changes in vision or light sensitivity
- Stuffy nose
Viagra Serious Side Effects
Serious side effects are rare with Viagra. Contact your healthcare provider immediately if you experience any of the following.
- Erection lasting for more than 4 hours
- Vision loss
- Dangerously low blood pressure: feeling faint or weak, dizziness, blurry vision, feeling confused
Effects of other drugs, drug classes and over-the-counter products on Viagra
The following medications may interact with Viagra:
- Concomitant alpha-blockers or amlodipine: Note additive blood pressure lowering effects
- Use with ritonavir and other potent CYP3A inhibitors: Not recommended
- Concomitant PDE-5 inhibitors: Avoid use with REVATIO or other PDE-5 inhibitors
Who makes Viagra?
Pfizer Inc.
Is Viagra safe in pregnancy?
Viagra is not indicated for use in women. There are no adequate and well-controlled studies of sildenafil in
pregnant women.













