Drug interactions
Haloperidol + Pentobarbital
Severity: Moderate
Haloperidol and Pentobarbital: 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
Pentobarbital is a barbiturate that deepens CNS depression when given with haloperidol, increasing sedation and respiratory depression. Barbiturates also induce hepatic enzymes, which can reduce haloperidol exposure over time.
What this interaction means in plain words
Haloperidol and Pentobarbital 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 plus barbiturate-mediated induction of haloperidol metabolism.
What to do
Monitor sedation and respiratory status when combining. Watch for loss of antipsychotic effect with prolonged barbiturate use and adjust the haloperidol dose accordingly.
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 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 Haloperidol with Pentobarbital?
MediHelp rates the interaction as moderate. Haloperidol and Pentobarbital 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. Pentobarbital is a barbiturate that deepens CNS depression when given with haloperidol, increasing sedation and respiratory depression. Barbiturates also induce hepatic enzymes, which can reduce haloperidol exposure over time.
How serious is the interaction between Haloperidol and Pentobarbital?
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 sedation and respiratory status when combining. Watch for loss of antipsychotic effect with prolonged barbiturate use and adjust the haloperidol dose accordingly.
What other medicines interact with Haloperidol?
MediHelp also lists interactions of Haloperidol with, for example, Dofetilide, Dronedarone, Ibutilide. The full list is on the Haloperidol page.
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