Medicinal fentanyl comes in a number of different forms and strengths including:

transdermal patches (Durogesic® and generic versions)

lozenges/lollipops (Actiq®)

intravenous injection (Sublimaze®).

Illicit use

Some people use fentanyl illegally by extracting the fentanyl from the patch and injecting it. This is very risky as it is extremely hard to judge a dose size.

Fentanyl can be ‘diverted’. Diversion occurs when medication that is prescribed by a…