Sildenafil Citrate
Also sold as SILDENAFIL CITRATE, Sildenafil, Viagra
Medicine summary · from official FDA labels · Oct 19, 2026
What it’s used for
Sildenafil tablets are indicated for the treatment of erectile dysfunction.
How to take it
For most patients, the recommended dose is 50 mg taken, as needed, approximately 1 hour before sexual activity. However, sildenafil tablets may be taken anywhere from 30 minutes to 4 hours before sexual activity ( 2.
Important warnings
Patients should not use sildenafil if sexual activity is inadvisable due to cardiovascular status ( 5. 1 ) Patients should seek emergency treatment if an erection lasts >4 hours.
Common side effects
The following are discussed in more detail in other sections of the labeling: Cardiovascular [ see Warnings and Precautions (5. 1) ] Prolonged Erection and Priapism [ see Warnings and Precautions (5.
Interactions
Sildenafil can potentiate the hypotensive effects of nitrates, alpha blockers, and anti-hypertensives ( 4.
If pregnant or breastfeeding
8.
Forms & strengths
10 MG/ML Oral Suspension · 50 MG Oral Tablet · 25 MG Oral Tablet · 100 MG Oral Tablet · 20 MG Oral Tablet
Questions to ask your doctor or pharmacist
- Is this the right medicine for my condition, and how long should I take it?
- What side effects should I watch for, and which need urgent attention?
- Does this interact with my other medicines, supplements, or alcohol?
- What should I do if I miss a dose or take too much?