Drug interactions
Fentanyl transdermal + Topiramate
Severity: Moderate
Fentanyl transdermal and Topiramate: moderate 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
Topiramate adds CNS depressant effects to those of fentanyl, which may cause deeper sedation and cognitive impairment, and occasionally respiratory depression. Transdermal fentanyl has a long duration of effect, so problems may persist after the patch is removed.
What this interaction means in plain words
Fentanyl transdermal and Topiramate can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Additive central nervous system and respiratory depressant effects.
What to do
Monitor sedation and respiratory status when starting or titrating either drug, and reduce the fentanyl dose if excessive drowsiness occurs.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Topiramate
Frequently asked questions
Can I take Fentanyl transdermal with Topiramate?
MediHelp rates the interaction as moderate. Fentanyl transdermal and Topiramate can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Topiramate adds CNS depressant effects to those of fentanyl, which may cause deeper sedation and cognitive impairment, and occasionally respiratory depression. Transdermal fentanyl has a long duration of effect, so problems may persist after the patch is removed.
How serious is the interaction between Fentanyl transdermal and Topiramate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor sedation and respiratory status when starting or titrating either drug, and reduce the fentanyl dose if excessive drowsiness occurs.
What other medicines interact with Topiramate?
MediHelp also lists interactions of Topiramate with, for example, Benzhydrocodone / acetaminophen, Buprenorphine long-acting, Buprenorphine subdermal implant. The full list is on the Topiramate page.
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