Drug interactions
Asenapine + Peginterferon alfa 2a
Severity: Minor
Asenapine and Peginterferon alfa 2a: 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
Peginterferon alfa-2a can modestly inhibit CYP1A2, which is a metabolic pathway of asenapine, so asenapine exposure may rise. The effect is likely small.
What this interaction means in plain words
Asenapine and Peginterferon alfa 2a have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Asenapine belongs to Central Nervous System; Peginterferon alfa 2a belongs to Anti Virals.
Why it happens
Interferon-mediated downregulation of CYP1A2 reduces asenapine metabolism.
What to do
No routine adjustment is needed; monitor for sedation, orthostatic hypotension and extrapyramidal symptoms.
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 Peginterferon alfa 2a
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 Peginterferon alfa 2a?
MediHelp rates the interaction as minor. Asenapine and Peginterferon alfa 2a have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Peginterferon alfa-2a can modestly inhibit CYP1A2, which is a metabolic pathway of asenapine, so asenapine exposure may rise. The effect is likely small.
How serious is the interaction between Asenapine and Peginterferon alfa 2a?
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 adjustment is needed; monitor for sedation, orthostatic hypotension and extrapyramidal symptoms.
What other medicines interact with Peginterferon alfa 2a?
MediHelp also lists interactions of Peginterferon alfa 2a with, for example, Clozapine, Deferiprone, Hydroxycarbamide. The full list is on the Peginterferon alfa 2a page.
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