Drug interactions
Ketamine + Penbutolol
Severity: Moderate
Ketamine and Penbutolol: 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
Beta-blockers can blunt the sympathetic stimulation produced by ketamine, and in catecholamine-depleted patients ketamine may act as a direct myocardial depressant. This may result in hypotension or reduced cardiac output.
What this interaction means in plain words
Ketamine and Penbutolol 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
Pharmacodynamic opposition of ketamine sympathomimetic effects by beta-blockade, with possible additive hypotension.
What to do
Monitor blood pressure and heart rate during ketamine administration. Be ready to treat hypotension and bradycardia.
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 Penbutolol?
MediHelp rates the interaction as moderate. Ketamine and Penbutolol 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. Beta-blockers can blunt the sympathetic stimulation produced by ketamine, and in catecholamine-depleted patients ketamine may act as a direct myocardial depressant. This may result in hypotension or reduced cardiac output.
How serious is the interaction between Ketamine and Penbutolol?
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 blood pressure and heart rate during ketamine administration. Be ready to treat hypotension and bradycardia.
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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