Drug interactions
Baclofen + Fluphenazine
Severity: Moderate
Baclofen and Fluphenazine: 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
Fluphenazine is a sedating antipsychotic and baclofen is a centrally acting muscle relaxant, so combined use can increase drowsiness, dizziness and confusion. Baclofen can also lower seizure threshold and phenothiazines may add to this risk.
What this interaction means in plain words
Baclofen and Fluphenazine 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; Fluphenazine belongs to Central Nervous System.
Why it happens
Additive CNS depression through GABA-B agonism and dopamine/histamine/adrenergic receptor blockade.
What to do
Monitor for oversedation, confusion and falls, particularly when starting or increasing either drug. Titrate baclofen slowly and reduce doses if sedation 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 Fluphenazine
- Arsenic trioxide + Fluphenazine Contraindicated
- Dofetilide + Fluphenazine Contraindicated
- Fluphenazine + Ibutilide Contraindicated
- Fluphenazine + Pimozide Contraindicated
- Adagrasib + Fluphenazine Major
- Alfentanil + Fluphenazine Major
Frequently asked questions
Can I take Baclofen with Fluphenazine?
MediHelp rates the interaction as moderate. Baclofen and Fluphenazine 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. Fluphenazine is a sedating antipsychotic and baclofen is a centrally acting muscle relaxant, so combined use can increase drowsiness, dizziness and confusion. Baclofen can also lower seizure threshold and phenothiazines may add to this risk.
How serious is the interaction between Baclofen and Fluphenazine?
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, confusion and falls, particularly when starting or increasing either drug. Titrate baclofen slowly and reduce doses if sedation 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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