Drug interactions
Fentanyl iontophoretic transdermal system + Nortriptyline
Severity: Major
Fentanyl iontophoretic transdermal system and Nortriptyline: 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
Concurrent use of nortriptyline with fentanyl can produce additive sedation and respiratory depression. Serotonin syndrome is also possible because both agents affect serotonergic transmission. The risk is highest at initiation and with dose increases.
What this interaction means in plain words
Fentanyl iontophoretic transdermal system and Nortriptyline 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.
Why it happens
Additive CNS and respiratory depression, plus additive serotonergic effects.
What to do
Use only if alternatives are inadequate, with the lowest effective doses of each drug. Monitor sedation, breathing and serotonin toxicity symptoms.
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 Nortriptyline
- Disopyramide + Nortriptyline Contraindicated
- Dofetilide + Nortriptyline Contraindicated
- Dronedarone + Nortriptyline Contraindicated
- Ibutilide + Nortriptyline Contraindicated
- Isocarboxazid + Nortriptyline Contraindicated
- Methylene blue + Nortriptyline Contraindicated
Frequently asked questions
Can I take Fentanyl iontophoretic transdermal system with Nortriptyline?
MediHelp rates the interaction as major. Fentanyl iontophoretic transdermal system and Nortriptyline 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. Concurrent use of nortriptyline with fentanyl can produce additive sedation and respiratory depression. Serotonin syndrome is also possible because both agents affect serotonergic transmission. The risk is highest at initiation and with dose increases.
How serious is the interaction between Fentanyl iontophoretic transdermal system and Nortriptyline?
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 alternatives are inadequate, with the lowest effective doses of each drug. Monitor sedation, breathing and serotonin toxicity symptoms.
What other medicines interact with Nortriptyline?
MediHelp also lists interactions of Nortriptyline with, for example, Disopyramide, Dofetilide, Dronedarone. The full list is on the Nortriptyline page.
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