Drug interactions
Fluphenazine + Meclizine
Severity: Moderate
Fluphenazine and Meclizine: moderate 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
Both agents have anticholinergic and sedating properties, so together they may cause excessive drowsiness, dry mouth, constipation, urinary retention and confusion, particularly in older patients. Meclizine may also mask early extrapyramidal or antiemetic-related signs.
What this interaction means in plain words
Fluphenazine and Meclizine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Fluphenazine belongs to Central Nervous System; Meclizine belongs to Respiratory.
Why it happens
Additive antimuscarinic and central H1 antihistaminic effects.
What to do
Monitor for anticholinergic toxicity and sedation, especially in elderly patients. Reduce the meclizine dose or choose a less anticholinergic alternative if symptoms occur.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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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 Meclizine
Frequently asked questions
Can I take Fluphenazine with Meclizine?
MediHelp rates the interaction as moderate. Fluphenazine and Meclizine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Both agents have anticholinergic and sedating properties, so together they may cause excessive drowsiness, dry mouth, constipation, urinary retention and confusion, particularly in older patients. Meclizine may also mask early extrapyramidal or antiemetic-related signs.
How serious is the interaction between Fluphenazine and Meclizine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for anticholinergic toxicity and sedation, especially in elderly patients. Reduce the meclizine dose or choose a less anticholinergic alternative if symptoms occur.
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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