Drug interactions
Diazepam + Topiramate
Severity: Moderate
Diazepam 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 and diazepam both cause CNS depression, so combined use can increase drowsiness, dizziness and cognitive slowing. Topiramate is a weak CYP3A4 inducer at higher doses, but a meaningful effect on diazepam levels is uncommon.
What this interaction means in plain words
Diazepam 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.
Diazepam belongs to Musculoskeletal; Topiramate belongs to Central Nervous System.
Why it happens
Additive CNS depression, with a minor possible induction of diazepam metabolism by topiramate.
What to do
Titrate both drugs slowly and monitor for sedation and cognitive effects. Warn patients against driving until the combined effect is known.
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 Diazepam
Other interactions of Topiramate
Frequently asked questions
Can I take Diazepam with Topiramate?
MediHelp rates the interaction as moderate. Diazepam 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 and diazepam both cause CNS depression, so combined use can increase drowsiness, dizziness and cognitive slowing. Topiramate is a weak CYP3A4 inducer at higher doses, but a meaningful effect on diazepam levels is uncommon.
How serious is the interaction between Diazepam 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: Titrate both drugs slowly and monitor for sedation and cognitive effects. Warn patients against driving until the combined effect is known.
What other medicines interact with Diazepam?
MediHelp also lists interactions of Diazepam with, for example, Calcium / magnesium / potassium / sodium oxybates, Alfentanil, Alprazolam. The full list is on the Diazepam page.
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