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Fentanyl

Written By Dr. Swati MishraReviewed By Dr. Rajeev Sharma
Last updated 25 Nov 2025 | 09:34 AM (UTC)

Fentanyl Uses

Fentanyl is used for severe chronic pain.

How Fentanyl works

Fentanyl is an opioid analgesic (pain reliever) which works by blocking transmission of pain signals to the brain to lower pain perception.

Common side effects of Fentanyl

Dizziness, Vomiting, Nausea, Drowsiness, Application site redness, Respiratory depression, Rigidity
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Expert advice for Fentanyl

  • Use Fentanyl as instructed by your doctor. Never take in greater amounts or more often than prescribed.
  • It causes sleepiness or drowsiness. If this happens to you, do not drive or use machinery.
  • Avoid consuming alcohol when taking the Fentanyl, as it may cause excessive sleepiness or drowsiness.
  • Inform your doctor if you have ever been diagnosed with kidney or liver problems.
  • Store opioid pain relievers in a safe place and out of reach of others.

Frequently asked questions for Fentanyl

Fentanyl may cause drowsiness and dizziness, especially in the beginning of the treatment. Do not drive or work with tools or machinery if your alertness is affected. It is not advisable to drink alcohol during treatment with this medicine as it might increase sleepiness.