Fentanyl 100mcg Patches


Fentanyl, also spelled fentanil, is a powerful opioid used as a pain medication and, together with other medications, for anesthesia. It is also used as a recreational drug, sometimes mixed with heroin, cocaine, benzodiazepine, or methamphetamine. In 2020, fentanyl tablets containing xylazine began circulating. Wikipedia
CAS ID437-38-7
Molar mass336.471 g/mol
Pronunciation/ˈfɛntənɪl/ or /ˈfɛntənəl/
MetabolismLiver, primarily by CYP3A4
Duration of actionIV: 30–60 minutes
Bioavailability: 92% (transdermal); 89% (intranasal); 50% (buccal); 33% (ingestion); 100% (intramuscular); 55% (inhaled)


This medication is used to help relieve severe ongoing pain (such as due to cancer). Fentanyl belongs to a class of drugs known as opioid analgesics. It works in the brain to change how your body feels and responds to pain. Do not use the patch form of fentanyl to relieve pain that is mild or that will go away in a few days. This medication is not for occasional (“as needed”) use.

How to use Fentanyl Patch, Transdermal 72 Hours

See also the Warning section.

Read the Medication Guide and, if available, the Instructions for Use provided by your pharmacist before you start using this medication and each time you get a refill. Learn how to properly use, store, and discard the patches. If you have any questions, ask your doctor or pharmacist.

Use this medication on a regular schedule as directed by your doctor, not as needed for sudden (breakthrough) pain.

Before you start using this medication, ask your doctor or pharmacist if you should stop or change how you use your other opioid medication(s). It may take up to 24 hours before you have pain relief from fentanyl patches. Other pain relievers (such as acetaminophen, and ibuprofen) may also be prescribed. Ask your doctor or pharmacist about using fentanyl safely with other drugs.

Additional information


4 packets, 8 packets


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