Last updated : May 25, 2017
Fentanyl is a depressant drug, which means it slows down the messages travelling between the brain and body. It belongs to a group of drugs known as opioids. It is prescribed for the for chronic, severe pain as a result of cancer, nerve damage, back injury, major trauma or other causes.1 In Australia, fentanyl is a schedule 8 drug.2 It is about 80 to 100 times stronger than morphine.3
Fentanyl comes in a number of different forms and strengths including:
Some people use fentanyl illegally to get high by extracting the fentanyl from the patch and injecting it. This is very risky as there is little difference between the amount needed to get high and the amount that causes overdose. It is also extremely hard to judge a dose size.
There is no safe level of drug use. Use of any drug always carries some risk. It’s important to be careful when taking any type of drug.
Fentanyl affects everyone differently, based on:
You may experience:
If the dose is too high, you might overdose. If you have any of these symptoms, call an ambulance straight away by dialling triple zero (000). Ambulance officers do not have to involve the police.
Naloxone (also known as Narcan®) reverses the effects of opiates (including fentanyl), in the case of an overdose. Naloxone can be injected intravenously (into a vein) or intramuscularly (into a muscle) by medical professionals, such as paramedics. It can also be administered by family and friends of people who use opiates. Speak with your chemist or pharmacist for more information.
Injecting fentanyl and sharing needles may also cause:
Regular use of fentanyl may cause:
The effects of taking fentanyl with other drugs – including over-the-counter or prescribed medications – can be unpredictable and dangerous and could cause:
Giving up fentanyl after using it for a long time is challenging because the body has to get used to functioning without it. Withdrawal symptoms usually start within 12 hours after the last dose and can last for about a week – days 1 to 3 will be the worst. These symptoms can include:
constipation, cramps, diarrhoea, dizziness, euphoria, fatigue, headache, impaired balance, indigestion, low blood pressure, nausea, rash, reduced appetite, relief from pain, skin rashes, slurred speech, treat severe pain, vomiting, weakness, wind.