Drug interactions
Baclofen + Chlorpromazine
Severity: Moderate
Baclofen and Chlorpromazine: 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
Chlorpromazine is strongly sedating and can cause hypotension, while baclofen also causes drowsiness and weakness. Combined use may markedly increase sedation and the risk of falls, and baclofen may lower seizure threshold alongside chlorpromazine.
What this interaction means in plain words
Baclofen and Chlorpromazine 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.
Baclofen belongs to Musculoskeletal; Chlorpromazine belongs to Central Nervous System.
Why it happens
Additive CNS depression and hypotensive effects from the antipsychotic and the GABA-B agonist.
What to do
Start with low doses and titrate slowly, monitoring sedation, blood pressure and fall risk. Reduce either drug if oversedation 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 Baclofen
Other interactions of Chlorpromazine
- Chlorpromazine + Dofetilide Contraindicated
- Chlorpromazine + Dronedarone Contraindicated
- Chlorpromazine + Droperidol Contraindicated
- Chlorpromazine + Ibutilide Contraindicated
- Chlorpromazine + Metrizamide Contraindicated
- Chlorpromazine + Panobinostat Contraindicated
Frequently asked questions
Can I take Baclofen with Chlorpromazine?
MediHelp rates the interaction as moderate. Baclofen and Chlorpromazine 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. Chlorpromazine is strongly sedating and can cause hypotension, while baclofen also causes drowsiness and weakness. Combined use may markedly increase sedation and the risk of falls, and baclofen may lower seizure threshold alongside chlorpromazine.
How serious is the interaction between Baclofen and Chlorpromazine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Start with low doses and titrate slowly, monitoring sedation, blood pressure and fall risk. Reduce either drug if oversedation occurs.
What other medicines interact with Baclofen?
MediHelp also lists interactions of Baclofen with, for example, Alfentanil, Amobarbital, Belladonna and opium. The full list is on the Baclofen page.
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