Pfizer Viagra (Sildenafil Citrate) is a prescription medicine used to treat erectile dysfunction (ED) in adult men. It belongs to a class of medicines called PDE5 inhibitors and works by increasing blood flow to the penis during sexual stimulation, helping support an erection.
Key Features
- Active ingredient: Sildenafil citrate
- Indicated for erectile dysfunction
- Available in 25 mg, 50 mg, and 100 mg strengths
- Blue, film-coated tablet
- Prescription medicine
- Manufactured under the Viagra brand associated with Pfizer; current U.S. product information has been transferred to Viatris.
How It Is Used
The usual recommended dose for most patients is 50 mg as needed, approximately 1 hour before sexual activity. Depending on effectiveness and tolerability, a healthcare provider may adjust the dose to 25 mg or 100 mg. It should not be taken more than once a day.
Important Safety Information
Viagra must not be taken with nitrate medicines because the combination can cause a dangerous drop in blood pressure. It can also interact with certain other medicines. Common side effects include headache, flushing, indigestion, nasal congestion, dizziness, and visual changes.













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