Drug interactions
Marijuana + Topiramate
Severity: Moderate
Marijuana 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
Cannabis causes sedation and impaired cognition and psychomotor function, which can add to topiramate's cognitive and sedative adverse effects. Patients may experience marked drowsiness, poor concentration and slowed thinking.
What this interaction means in plain words
Marijuana 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 CNS depression through cannabinoid receptor activity and topiramate's CNS effects.
What to do
Advise patients to avoid driving or hazardous tasks and to report excess sedation or cognitive problems. Reduce cannabis use if cognitive side effects emerge.
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 Marijuana with Topiramate?
MediHelp rates the interaction as moderate. Marijuana 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. Cannabis causes sedation and impaired cognition and psychomotor function, which can add to topiramate's cognitive and sedative adverse effects. Patients may experience marked drowsiness, poor concentration and slowed thinking.
How serious is the interaction between Marijuana 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: Advise patients to avoid driving or hazardous tasks and to report excess sedation or cognitive problems. Reduce cannabis use if cognitive side effects emerge.
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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