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Sildenafil
Pronounced sil-DEN-ah-fil
Brand names: Viagra, Revatio
Type: PDE5 inhibitor · All Heart & Blood Pressure Medicines
What Sildenafil is used for
- Erectile dysfunction
- Pulmonary arterial hypertension (lung artery pressure)
Common side effects
- Headache
- Flushing
- Indigestion
- Stuffy nose
- Vision changes such as a blue tint
Important cautions
- Must never be combined with nitrates such as nitroglycerin — the combination can cause a dangerous drop in blood pressure
- Sudden vision or hearing loss is rare but needs emergency care
How it comes
Tablets, liquid. This guide lists forms only — it never lists strengths or doses.
Related medicines — Heart & Blood Pressure Medicines
Please note: This page is a patient-education summary, not medical advice, and it deliberately contains no doses. Medicines affect everyone differently — always follow your own prescription and talk to your doctor or pharmacist before starting, stopping or changing any medicine.