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Sildenafil

Also sold as Sildenafil Citrate, Sildenafil, SILDENAFIL

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

2 DOSAGE AND ADMINISTRATION • 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

5 WARNINGS AND PRECAUTIONS • Patients should not use sildenafil tablets 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

7 DRUG INTERACTIONS • Sildenafil tablets 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?