Prescribed for adult men with erectile dysfunction.
- Standard starting dose 10 mg, taken 25–60 minutes before sexual activity, no more than once per day.
- Available as film-coated tablets and as orodispersible 10 mg tablets that dissolve on the tongue.
- Sexual stimulation is required for the medicine to work.
- Erection lasting more than 4 hours (priapism) — A&E.
- Sudden vision loss (NAION) or sudden hearing loss.
- Chest pain during or shortly after sex — emergency services.
- Severe allergic reaction.
- Irregular or prolonged ECG QT changes — relevant if you have a known QT-prolongation risk.
WHEN TO CALL THE DOCTOR
Call us through the in-app chat if you notice…
- Side effects that persist beyond a few hours or affect daily activities.
- Palpitations, fainting or chest discomfort during sex — A&E first.
- A new medication started since your consultation, especially heart-rhythm or antifungal medicines.
OFFICIAL SOURCE
This summary is condensed from the regulator's full product leaflet for ease of reading. The complete document — every interaction, dose adjustment and reporting note — is one click away.
This page summarises information from the regulator-approved leaflet for reference only. It is not medical advice and does not replace the assessment of an EU-licensed doctor. Your doctor will review your individual history, dose and interactions during your consultation.
← Back to consultationYou can print this page for your records.