Drug interactions
Baclofen + Nortriptyline
Severity: Moderate
Baclofen and Nortriptyline: 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
Nortriptyline is a sedating tricyclic and with baclofen may cause additive drowsiness, dizziness and cognitive slowing. Both can contribute to falls, and tricyclics can lower seizure threshold.
What this interaction means in plain words
Baclofen and Nortriptyline 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; Nortriptyline belongs to Central Nervous System.
Why it happens
Additive CNS depression from GABA-B agonism and antihistaminic, anticholinergic and alpha-blocking effects.
What to do
Monitor for oversedation, confusion and orthostasis, and start with low doses. Reduce either drug if adverse effects develop.
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 Nortriptyline
- Disopyramide + Nortriptyline Contraindicated
- Dofetilide + Nortriptyline Contraindicated
- Dronedarone + Nortriptyline Contraindicated
- Ibutilide + Nortriptyline Contraindicated
- Isocarboxazid + Nortriptyline Contraindicated
- Methylene blue + Nortriptyline Contraindicated
Frequently asked questions
Can I take Baclofen with Nortriptyline?
MediHelp rates the interaction as moderate. Baclofen and Nortriptyline 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. Nortriptyline is a sedating tricyclic and with baclofen may cause additive drowsiness, dizziness and cognitive slowing. Both can contribute to falls, and tricyclics can lower seizure threshold.
How serious is the interaction between Baclofen and Nortriptyline?
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 orthostasis, and start with low doses. Reduce either drug if adverse effects develop.
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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