Drug interactions
Caffeine + Fluphenazine
Severity: Minor
Caffeine and Fluphenazine: 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 offset fluphenazine's sedative effects. The clinical effect is unclear, and caffeine may also reduce the antipsychotic's absorption or effect in some reports.
What this interaction means in plain words
Caffeine and Fluphenazine 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; Fluphenazine belongs to Central Nervous System.
Why it happens
Pharmacodynamic opposition of CNS stimulation and sedation; any pharmacokinetic effect is not well established.
What to do
No routine action; watch for reduced psychotic symptom control or increased agitation with heavy caffeine intake.
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 Fluphenazine
- Arsenic trioxide + Fluphenazine Contraindicated
- Dofetilide + Fluphenazine Contraindicated
- Fluphenazine + Ibutilide Contraindicated
- Fluphenazine + Pimozide Contraindicated
- Adagrasib + Fluphenazine Major
- Alfentanil + Fluphenazine Major
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 Fluphenazine?
MediHelp rates the interaction as minor. Caffeine and Fluphenazine 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 offset fluphenazine's sedative effects. The clinical effect is unclear, and caffeine may also reduce the antipsychotic's absorption or effect in some reports.
How serious is the interaction between Caffeine and Fluphenazine?
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; watch for reduced psychotic symptom control or increased agitation with heavy caffeine intake.
What other medicines interact with Fluphenazine?
MediHelp also lists interactions of Fluphenazine with, for example, Arsenic trioxide, Dofetilide, Ibutilide. The full list is on the Fluphenazine page.
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