withdrawal symptoms of fentanyl
The many Fentanyl withdrawal symptoms may include: 1  Fatigue. 2  Headache. 3  Fever and sweating.  Muscle pain, diarrhea and 1  cramps. Insomnia.  Rapid heart 1  rate. Nausea and vomiting.  Irritability, mood swings and cognitive problems.
Fentanyl Withdrawal Symptoms Timeline. The first phase of withdrawal will last about 2 to 3 days and the patient may experience insomnia, sweating, muscle aches, agitation and runny nose. The next phase of withdrawal is the peak phase and usually consists of days 3, 4, and 5. Some of the Fentanyl withdrawal symptoms to expect include: nausea, vomiting, diarrhea, anxiety, mood swings, muscle and bone pain, increased runny nose and tearing, and depression.