Drug interactions
Caffeine + Peginterferon alfa 2a
Severity: Minor
Caffeine 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 reduces CYP1A2 activity, which is the main route of caffeine metabolism, so caffeine exposure can rise. This may increase jitteriness, palpitations or insomnia in sensitive patients.
What this interaction means in plain words
Caffeine 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.
Caffeine belongs to Miscellaneous; Peginterferon alfa 2a belongs to Anti Virals.
Why it happens
Interferon-mediated inhibition of CYP1A2 reduces caffeine clearance.
What to do
Advise patients to limit caffeine intake during interferon therapy if insomnia, palpitations or anxiety occur.
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 Caffeine
- Caffeine + Ephedrine Major
- Caffeine + Fezolinetant Major
- Caffeine + Methylenedioxymethamphetamine Major
- Caffeine + Selegiline transdermal Major
- Adenosine + Caffeine Moderate
- Benzphetamine + Caffeine Moderate
Frequently asked questions
Can I take Caffeine with Peginterferon alfa 2a?
MediHelp rates the interaction as minor. Caffeine 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 reduces CYP1A2 activity, which is the main route of caffeine metabolism, so caffeine exposure can rise. This may increase jitteriness, palpitations or insomnia in sensitive patients.
How serious is the interaction between Caffeine 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: Advise patients to limit caffeine intake during interferon therapy if insomnia, palpitations or anxiety occur.
What other medicines interact with Peginterferon alfa 2a?
MediHelp also lists interactions of Peginterferon alfa 2a with, for example, Clozapine, Deferiprone, Hydroxyurea. The full list is on the Peginterferon alfa 2a page.
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