Drug interactions
Asenapine + Pentobarbital
Severity: Moderate
Asenapine 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
Both agents depress the central nervous system, so combined use can cause excessive sedation, impaired psychomotor performance and, at higher doses, respiratory depression. Barbiturates may also lower the hypotensive threshold with antipsychotics.
What this interaction means in plain words
Asenapine 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 through GABA-A potentiation and antihistaminic/antagonist effects of asenapine.
What to do
Use the lowest effective doses and monitor sedation, blood pressure and respiration, particularly when starting or increasing either drug. Advise patients against driving or operating machinery.
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 Asenapine
- Asenapine + Pimozide Contraindicated
- Asenapine + Thioridazine Contraindicated
- Asenapine + Vandetanib Contraindicated
- Adagrasib + Asenapine Major
- Alfentanil + Asenapine Major
- Alfuzosin + Asenapine Major
Frequently asked questions
Can I take Asenapine with Pentobarbital?
MediHelp rates the interaction as moderate. Asenapine 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. Both agents depress the central nervous system, so combined use can cause excessive sedation, impaired psychomotor performance and, at higher doses, respiratory depression. Barbiturates may also lower the hypotensive threshold with antipsychotics.
How serious is the interaction between Asenapine 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: Use the lowest effective doses and monitor sedation, blood pressure and respiration, particularly when starting or increasing either drug. Advise patients against driving or operating machinery.
What other medicines interact with Asenapine?
MediHelp also lists interactions of Asenapine with, for example, Pimozide, Thioridazine, Vandetanib. The full list is on the Asenapine page.
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