Drug interactions
Fentanyl + Fentanyl iontophoretic transdermal system
Severity: Major
Fentanyl and Fentanyl iontophoretic transdermal system: 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 products deliver fentanyl, so combining them duplicates opioid exposure. This increases the risk of oversedation, respiratory depression and overdose.
What this interaction means in plain words
Fentanyl and Fentanyl iontophoretic transdermal system 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
Duplicate mu-opioid agonist therapy results in additive central nervous system and respiratory depression.
What to do
Avoid using the two fentanyl products together; choose a single route and dose. If overlap is unavoidable, monitor respiratory rate and sedation closely.
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
Frequently asked questions
Can I take Fentanyl with Fentanyl iontophoretic transdermal system?
MediHelp rates the interaction as major. Fentanyl and Fentanyl iontophoretic transdermal system 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 products deliver fentanyl, so combining them duplicates opioid exposure. This increases the risk of oversedation, respiratory depression and overdose.
How serious is the interaction between Fentanyl and Fentanyl iontophoretic transdermal system?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid using the two fentanyl products together; choose a single route and dose. If overlap is unavoidable, monitor respiratory rate and sedation closely.
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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