Drug interactions
Haloperidol + Peginterferon alfa 2b
Severity: Minor
Haloperidol and Peginterferon alfa 2b: 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 2b may modestly alter CYP2D6 metabolism of haloperidol, with an unpredictable direction. Any effect is likely small, but haloperidol carries QT and extrapyramidal risks.
What this interaction means in plain words
Haloperidol and Peginterferon alfa 2b have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Haloperidol belongs to Central Nervous System; Peginterferon alfa 2b belongs to Anti Virals.
Why it happens
Possible interferon modulation of CYP2D6 metabolism of haloperidol; not firmly established.
What to do
Monitor for extrapyramidal symptoms, sedation and QT changes. Adjust the haloperidol dose according to response.
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 2b
Other interactions of Haloperidol
- Dofetilide + Haloperidol Contraindicated
- Dronedarone + Haloperidol Contraindicated
- Haloperidol + Ibutilide Contraindicated
- Haloperidol + Levoketoconazole Contraindicated
- Haloperidol + Panobinostat Contraindicated
- Haloperidol + Pimozide Contraindicated
Frequently asked questions
Can I take Haloperidol with Peginterferon alfa 2b?
MediHelp rates the interaction as minor. Haloperidol and Peginterferon alfa 2b 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 2b may modestly alter CYP2D6 metabolism of haloperidol, with an unpredictable direction. Any effect is likely small, but haloperidol carries QT and extrapyramidal risks.
How serious is the interaction between Haloperidol and Peginterferon alfa 2b?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for extrapyramidal symptoms, sedation and QT changes. Adjust the haloperidol dose according to response.
What other medicines interact with Peginterferon alfa 2b?
MediHelp also lists interactions of Peginterferon alfa 2b with, for example, Aldesleukin, Deferiprone, Pexidartinib. The full list is on the Peginterferon alfa 2b page.
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