Drug interactions
Asenapine + Smoking
Severity: Minor
Asenapine and Smoking: minor 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
Tobacco smoke induces CYP1A2, which contributes to asenapine clearance. Smokers may therefore have somewhat lower asenapine exposure. The effect is generally modest, and no dose adjustment is required in labeling.
What this interaction means in plain words
Asenapine and Smoking have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Polycyclic aromatic hydrocarbons in smoke induce CYP1A2, increasing asenapine metabolism.
What to do
No routine dose change is needed. Reassess clinical response if the patient starts or stops smoking.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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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 Smoking?
MediHelp rates the interaction as minor. Asenapine and Smoking have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Tobacco smoke induces CYP1A2, which contributes to asenapine clearance. Smokers may therefore have somewhat lower asenapine exposure. The effect is generally modest, and no dose adjustment is required in labeling.
How serious is the interaction between Asenapine and Smoking?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine dose change is needed. Reassess clinical response if the patient starts or stops smoking.
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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