Drug interactions
Baclofen + Thioridazine
Severity: Moderate
Baclofen and Thioridazine: 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
Both drugs cause sedation, and thioridazine also causes orthostatic hypotension and anticholinergic effects, so combined use can impair alertness and increase falls. Thioridazine carries a separate QT prolongation risk that is not altered by baclofen but makes careful overall prescribing important.
What this interaction means in plain words
Baclofen and Thioridazine 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; Thioridazine belongs to Central Nervous System.
Why it happens
Additive CNS depression from GABA-B agonism and phenothiazine H1, alpha-1 and muscarinic blockade.
What to do
Use the lowest effective doses and monitor sedation and orthostatic blood pressure. Keep thioridazine ECG and electrolyte monitoring in place.
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 Thioridazine
- Abiraterone + Thioridazine Contraindicated
- Adagrasib + Thioridazine Contraindicated
- Amiodarone + Thioridazine Contraindicated
- Amisulpride + Thioridazine Contraindicated
- Amitriptyline + Thioridazine Contraindicated
- Amoxapine + Thioridazine Contraindicated
Frequently asked questions
Can I take Baclofen with Thioridazine?
MediHelp rates the interaction as moderate. Baclofen and Thioridazine 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. Both drugs cause sedation, and thioridazine also causes orthostatic hypotension and anticholinergic effects, so combined use can impair alertness and increase falls. Thioridazine carries a separate QT prolongation risk that is not altered by baclofen but makes careful overall prescribing important.
How serious is the interaction between Baclofen and Thioridazine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use the lowest effective doses and monitor sedation and orthostatic blood pressure. Keep thioridazine ECG and electrolyte monitoring in place.
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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