Sildenafil is used to treat erectile dysfunction (trouble getting or keeping an erection).
Take sildenafil with a glass of water, about one hour before having sex, or as directed. You can take it with or without food.
It may keep working for up to 4 hours.
Do not take more than one dose a day.
Some medicines available without a prescription may react with sildenafil including:
Tell your pharmacist or doctor about all medicines or treatments that you may be taking, including vitamins, herbal products (e.g. St John's wort) or recreational drugs.
Prolonged erection (longer than four hours)
Changes in vision
|Tell your doctor immediately
Runny or blocked nose
Muscle aches and pains
|Tell your doctor if troublesome
If you notice any other effects, discuss them with your doctor or pharmacist.
This leaflet contains important, but not all, information about this medicine.
Prepared by the MyMedicines Committee at Christchurch Hospital, Te Whatu Ora - Waitaha, New Zealand. March 2023
For more general information about this sheet and its contents, see: What does a My Medicines sheet cover?
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My Medicines Patient Information Leaflets (PILs) contain important, but not all, information about the medicines they describe.
For more information about the sheets, see: What does a My Medicines sheet cover?
My Medicines is developed by a team at Te Whatu Ora – Waitaha. Our team is made up of doctors, pharmacists, and a non-medical person to help us keep to plain language. We also discuss our information with specialist health professionals or groups when needed