Fentanyl is a very strong opioid painkiller used in hospital, during anaesthesia and for severe pain.

What Fentanyl Is Used For

Pain relief during and after surgery
Severe pain, including cancer pain, under specialist care

Common Side Effects

Drowsiness
Nausea
Constipation
Slow breathing

Precautions

It is a controlled medicine that can cause dependence and dangerously slow breathing. It is used only under medical supervision. Avoid alcohol and other sedatives.

This page is general information only. It is not a substitute for advice from your doctor or pharmacist, and it does not include dosage. Always follow the directions given to you and read the leaflet inside the pack.