Drug interactions
Fentanyl transmucosal + Lamotrigine
Severity: Moderate
Fentanyl transmucosal and Lamotrigine: 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
Transmucosal fentanyl produces rapid opioid effects including sedation and respiratory depression, and lamotrigine adds its own CNS-depressant effects. The combination can increase drowsiness and impair alertness.
What this interaction means in plain words
Fentanyl transmucosal and Lamotrigine 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 depression.
What to do
Monitor for oversedation and slowed breathing, especially when doses change. Titrate fentanyl cautiously and advise against driving and alcohol.
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 Lamotrigine
Frequently asked questions
Can I take Fentanyl transmucosal with Lamotrigine?
MediHelp rates the interaction as moderate. Fentanyl transmucosal and Lamotrigine 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. Transmucosal fentanyl produces rapid opioid effects including sedation and respiratory depression, and lamotrigine adds its own CNS-depressant effects. The combination can increase drowsiness and impair alertness.
How serious is the interaction between Fentanyl transmucosal and Lamotrigine?
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 for oversedation and slowed breathing, especially when doses change. Titrate fentanyl cautiously and advise against driving and alcohol.
What other medicines interact with Lamotrigine?
MediHelp also lists interactions of Lamotrigine with, for example, Desogestrel-ethinyl estradiol, Divalproex, Dofetilide. The full list is on the Lamotrigine page.
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