What does it do?

Sildenafil is used to treat high pressure in the blood vessels of the lungs (pulmonary hypertension).

How should you take it?

Take sildenafil as directed with a glass of water.

What if you forget a dose?

Take the missed dose as soon as possible. If it is close to the time for your next dose, skip the missed dose and carry on as normal. Do not take two doses at the same time.

Can you take other medicines?

Some medicines available without a prescription may react with sildenafil including:

• glyceryl trinitrate (e.g. Nitrolingual Pumpspray®, Lycinate®)

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.

What side effects might you notice?

Side Effects	Recommended action
Prolonged erection (longer than four hours) Changes in vision	Tell your doctor immediately
Urinary symptoms	Tell your doctor
Headache, dizziness, trouble sleeping Hot flushing Runny or blocked nose, nose bleeds Indigestion Muscle aches and pains, tingling or numbness	Tell your doctor if troublesome
Stomach upset	Take with food

If you notice any other effects, discuss them with your doctor or pharmacist.

Other information:

• Tell your doctor if you have blood pressure, bleeding, blood, stomach, heart, liver, kidney, penis (other than impotence), hearing or eye problems, or if you have had a recent stroke.
• Tell your doctor if you are pregnant, planning to become pregnant, or breastfeeding.
• Grapefruit, grapefruit juice or sour/Seville oranges may react with sildenafil. Discuss with your pharmacist.
• If you are taking nitrate medicines (e.g. glyceryl trinitrate), you should not use sildenafil. Discuss with your doctor or pharmacist.