Drug interactions
Clonazepam + Dimenhydrinate
Severity: Moderate
Clonazepam and Dimenhydrinate: 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
Dimenhydrinate is a sedating antihistamine, and taking it with clonazepam increases drowsiness and dizziness. Impaired coordination and confusion may occur, particularly in older adults.
What this interaction means in plain words
Clonazepam and Dimenhydrinate 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.
Clonazepam belongs to Central Nervous System; Dimenhydrinate belongs to Respiratory.
Why it happens
Additive CNS depression through H1-receptor antagonism and GABA-A potentiation.
What to do
Monitor for oversedation and avoid combining in older patients where possible. Counsel on avoiding 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 Clonazepam
- Calcium / magnesium / potassium / sodium oxybates + Clonazepam Contraindicated
- Clonazepam + Sodium oxybate Contraindicated
- Alfentanil + Clonazepam Major
- Alprazolam + Clonazepam Major
- Amobarbital + Clonazepam Major
- Belladonna and opium + Clonazepam Major
Other interactions of Dimenhydrinate
Frequently asked questions
Can I take Clonazepam with Dimenhydrinate?
MediHelp rates the interaction as moderate. Clonazepam and Dimenhydrinate 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. Dimenhydrinate is a sedating antihistamine, and taking it with clonazepam increases drowsiness and dizziness. Impaired coordination and confusion may occur, particularly in older adults.
How serious is the interaction between Clonazepam and Dimenhydrinate?
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 avoid combining in older patients where possible. Counsel on avoiding driving and alcohol.
What other medicines interact with Clonazepam?
MediHelp also lists interactions of Clonazepam with, for example, Calcium / magnesium / potassium / sodium oxybates, Sodium oxybate, Alfentanil. The full list is on the Clonazepam page.
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