Drug interactions
Clonazepam + Haloperidol
Severity: Moderate
Clonazepam and Haloperidol: 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
The combination is used in practice for agitation but produces additive sedation and psychomotor impairment. Higher doses or frail patients face an increased risk of oversedation and respiratory depression.
What this interaction means in plain words
Clonazepam and Haloperidol 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; Haloperidol belongs to Central Nervous System.
Why it happens
Additive CNS depression from GABA-A potentiation and central dopamine blockade.
What to do
Monitor level of consciousness and respiration, especially with parenteral dosing or in older patients. Start with low doses and titrate carefully.
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 Haloperidol
- Dofetilide + Haloperidol Contraindicated
- Dronedarone + Haloperidol Contraindicated
- Haloperidol + Ibutilide Contraindicated
- Haloperidol + Levoketoconazole Contraindicated
- Haloperidol + Panobinostat Contraindicated
- Haloperidol + Pimozide Contraindicated
Frequently asked questions
Can I take Clonazepam with Haloperidol?
MediHelp rates the interaction as moderate. Clonazepam and Haloperidol 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. The combination is used in practice for agitation but produces additive sedation and psychomotor impairment. Higher doses or frail patients face an increased risk of oversedation and respiratory depression.
How serious is the interaction between Clonazepam and Haloperidol?
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 level of consciousness and respiration, especially with parenteral dosing or in older patients. Start with low doses and titrate carefully.
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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