Drug interactions
Ketamine + Pentobarbital
Severity: Moderate
Ketamine and Pentobarbital: 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
Pentobarbital is a barbiturate sedative, and with ketamine produces additive sedation with a risk of respiratory depression and hypotension.
What this interaction means in plain words
Ketamine and Pentobarbital 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.
Why it happens
Additive CNS depression via GABA-A potentiation and NMDA antagonism.
What to do
Titrate doses carefully, monitor ventilation and blood pressure, and ensure airway support is available.
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 Ketamine
Frequently asked questions
Can I take Ketamine with Pentobarbital?
MediHelp rates the interaction as moderate. Ketamine and Pentobarbital 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. Pentobarbital is a barbiturate sedative, and with ketamine produces additive sedation with a risk of respiratory depression and hypotension.
How serious is the interaction between Ketamine and Pentobarbital?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Titrate doses carefully, monitor ventilation and blood pressure, and ensure airway support is available.
What other medicines interact with Ketamine?
MediHelp also lists interactions of Ketamine with, for example, Benzhydrocodone / acetaminophen, Brexanolone, Buprenorphine buccal. The full list is on the Ketamine page.
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