Drug interactions
Dimenhydrinate + Marijuana
Severity: Moderate
Dimenhydrinate and Marijuana: 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, impaired cognition and tachycardia, and may add to dimenhydrinate's drowsiness. Both may also contribute to dry mouth and confusion.
What this interaction means in plain words
Dimenhydrinate and Marijuana 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 and additive anticholinergic-type effects.
What to do
Advise patients to avoid driving and hazardous tasks and to monitor for excessive sedation or confusion. Reduce use of one agent if impairment 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 Dimenhydrinate
Frequently asked questions
Can I take Dimenhydrinate with Marijuana?
MediHelp rates the interaction as moderate. Dimenhydrinate and Marijuana 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, impaired cognition and tachycardia, and may add to dimenhydrinate's drowsiness. Both may also contribute to dry mouth and confusion.
How serious is the interaction between Dimenhydrinate and Marijuana?
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 and hazardous tasks and to monitor for excessive sedation or confusion. Reduce use of one agent if impairment occurs.
What other medicines interact with Dimenhydrinate?
MediHelp also lists interactions of Dimenhydrinate with, for example, Belladonna and opium, Brexanolone, Calcium / magnesium / potassium / sodium oxybates. The full list is on the Dimenhydrinate page.
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