Drug interactions
Fentanyl + Sertraline
Severity: Major
Fentanyl and Sertraline: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Both drugs enhance serotonergic activity, so using them together raises the risk of serotonin syndrome (agitation, hyperthermia, clonus, autonomic instability). Sertraline is a weak CYP3A4 inhibitor and may modestly raise fentanyl exposure, adding to opioid effects.
What this interaction means in plain words
Fentanyl and Sertraline can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Fentanyl belongs to Musculoskeletal; Sertraline belongs to Central Nervous System.
Why it happens
Additive serotonergic effects (SSRI reuptake inhibition plus fentanyl serotonergic activity) with possible weak CYP3A4 inhibition.
What to do
Use only if needed and monitor for serotonin syndrome signs, especially at initiation and after dose increases. Reduce fentanyl dose if excess sedation or respiratory depression occurs, and stop both agents if serotonin syndrome is suspected.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Fentanyl
- Alvimopan + Fentanyl Contraindicated
- Fentanyl + Isocarboxazid Contraindicated
- Fentanyl + Olanzapine / samidorphan Contraindicated
- Fentanyl + Phenelzine Contraindicated
- Fentanyl + Tranylcypromine Contraindicated
- Alfentanil + Fentanyl Major
Other interactions of Sertraline
- Isocarboxazid + Sertraline Contraindicated
- Methylene blue + Sertraline Contraindicated
- Phenelzine + Sertraline Contraindicated
- Pimozide + Sertraline Contraindicated
- Selegiline transdermal + Sertraline Contraindicated
- Selegiline + Sertraline Contraindicated
Frequently asked questions
Can I take Fentanyl with Sertraline?
MediHelp rates the interaction as major. Fentanyl and Sertraline can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Both drugs enhance serotonergic activity, so using them together raises the risk of serotonin syndrome (agitation, hyperthermia, clonus, autonomic instability). Sertraline is a weak CYP3A4 inhibitor and may modestly raise fentanyl exposure, adding to opioid effects.
How serious is the interaction between Fentanyl and Sertraline?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use only if needed and monitor for serotonin syndrome signs, especially at initiation and after dose increases. Reduce fentanyl dose if excess sedation or respiratory depression occurs, and stop both agents if serotonin syndrome is suspected.
What other medicines interact with Fentanyl?
MediHelp also lists interactions of Fentanyl with, for example, Alvimopan, Isocarboxazid, Olanzapine / samidorphan. The full list is on the Fentanyl page.
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