Drug interactions
Amitriptyline + Baclofen
Severity: Moderate
Amitriptyline and Baclofen: 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 can cause additive sedation, hypotonia and memory or cognitive impairment. Reports describe more pronounced muscle weakness, and tricyclic anticholinergic effects may add to confusion and urinary retention.
What this interaction means in plain words
Amitriptyline and Baclofen 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.
Amitriptyline belongs to Central Nervous System; Baclofen belongs to Musculoskeletal.
Why it happens
Additive CNS depression from GABA-B agonism by baclofen and antihistaminic and anticholinergic effects of amitriptyline.
What to do
Monitor for sedation, weakness and confusion, and reduce the dose of either drug if they occur. Take particular care in older patients and those with renal impairment.
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 Amitriptyline
- Amitriptyline + Isocarboxazid Contraindicated
- Amitriptyline + Methylene blue Contraindicated
- Amitriptyline + Phenelzine Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amitriptyline + Procarbazine Contraindicated
- Amitriptyline + Safinamide Contraindicated
Frequently asked questions
Can I take Amitriptyline with Baclofen?
MediHelp rates the interaction as moderate. Amitriptyline and Baclofen 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 can cause additive sedation, hypotonia and memory or cognitive impairment. Reports describe more pronounced muscle weakness, and tricyclic anticholinergic effects may add to confusion and urinary retention.
How serious is the interaction between Amitriptyline and Baclofen?
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 sedation, weakness and confusion, and reduce the dose of either drug if they occur. Take particular care in older patients and those with renal impairment.
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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