Drug interactions
Fentanyl iontophoretic transdermal system + Topiramate
Severity: Moderate
Fentanyl iontophoretic transdermal system 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
Fentanyl is a potent opioid, and topiramate adds CNS depressant effects. The combination may increase sedation, cognitive impairment and, less commonly, respiratory depression.
What this interaction means in plain words
Fentanyl iontophoretic transdermal system 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 rate, particularly in the first days of therapy, and reduce the opioid 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 iontophoretic transdermal system with Topiramate?
MediHelp rates the interaction as moderate. Fentanyl iontophoretic transdermal system 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. Fentanyl is a potent opioid, and topiramate adds CNS depressant effects. The combination may increase sedation, cognitive impairment and, less commonly, respiratory depression.
How serious is the interaction between Fentanyl iontophoretic transdermal system 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 rate, particularly in the first days of therapy, and reduce the opioid 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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