Drug interactions
Baclofen + Ketamine
Severity: Moderate
Baclofen and Ketamine: 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
Ketamine produces dissociation and sedation, and with baclofen the CNS and respiratory depressant effects may be additive. Risk is greatest with anesthetic or high doses, or with overdose or renal impairment where baclofen accumulates.
What this interaction means in plain words
Baclofen and Ketamine 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; Ketamine belongs to Central Nervous System.
Why it happens
Additive CNS depression from GABA-B agonism and NMDA receptor antagonism.
What to do
Monitor sedation level and respiratory status when ketamine is given to patients on baclofen. Reduce ketamine dosing if excessive 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 Ketamine
Frequently asked questions
Can I take Baclofen with Ketamine?
MediHelp rates the interaction as moderate. Baclofen and Ketamine 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. Ketamine produces dissociation and sedation, and with baclofen the CNS and respiratory depressant effects may be additive. Risk is greatest with anesthetic or high doses, or with overdose or renal impairment where baclofen accumulates.
How serious is the interaction between Baclofen and Ketamine?
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 sedation level and respiratory status when ketamine is given to patients on baclofen. Reduce ketamine dosing if excessive 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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