Drug interactions
Caffeine + Chlorpromazine
Severity: Minor
Caffeine and Chlorpromazine: 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
Caffeine is a stimulant that may partly offset chlorpromazine's sedation. Caffeine may also reduce the absorption of some antipsychotics by forming precipitates, and heavy intake can worsen anxiety or agitation. Clinical significance is usually small.
What this interaction means in plain words
Caffeine and Chlorpromazine 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; Chlorpromazine belongs to Central Nervous System.
Why it happens
Pharmacodynamic opposition of CNS effects; possible reduced oral absorption from complex formation.
What to do
No routine action is needed; advise moderate caffeine intake. Reassess symptom control if caffeine consumption changes markedly.
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 Chlorpromazine
- Chlorpromazine + Dofetilide Contraindicated
- Chlorpromazine + Dronedarone Contraindicated
- Chlorpromazine + Droperidol Contraindicated
- Chlorpromazine + Ibutilide Contraindicated
- Chlorpromazine + Metrizamide Contraindicated
- Chlorpromazine + Panobinostat Contraindicated
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 Chlorpromazine?
MediHelp rates the interaction as minor. Caffeine and Chlorpromazine 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 is a stimulant that may partly offset chlorpromazine's sedation. Caffeine may also reduce the absorption of some antipsychotics by forming precipitates, and heavy intake can worsen anxiety or agitation. Clinical significance is usually small.
How serious is the interaction between Caffeine and Chlorpromazine?
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 action is needed; advise moderate caffeine intake. Reassess symptom control if caffeine consumption changes markedly.
What other medicines interact with Chlorpromazine?
MediHelp also lists interactions of Chlorpromazine with, for example, Dofetilide, Dronedarone, Droperidol. The full list is on the Chlorpromazine page.
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