Answer
Fentanyl is an opioid, so tolerance, dependence and opioid-use disorder can develop with repeated exposure.
Sources for this answer
- BUFYL 1 mg/ml and 2 micrograms/ml Solution for Infusion — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.