Drug interactions
Meclizine + Trifluoperazine
Severity: Moderate
Meclizine and Trifluoperazine: 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
Trifluoperazine is a phenothiazine with sedative and anticholinergic properties, and meclizine adds to both. This may increase drowsiness, dry mouth, constipation, urinary retention and confusion.
What this interaction means in plain words
Meclizine and Trifluoperazine 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.
Why it happens
Additive antimuscarinic and CNS depressant effects.
What to do
Monitor for sedation and anticholinergic effects, especially in older adults. Reduce the meclizine dose or choose an alternative if effects are troublesome.
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 Meclizine
Frequently asked questions
Can I take Meclizine with Trifluoperazine?
MediHelp rates the interaction as moderate. Meclizine and Trifluoperazine 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. Trifluoperazine is a phenothiazine with sedative and anticholinergic properties, and meclizine adds to both. This may increase drowsiness, dry mouth, constipation, urinary retention and confusion.
How serious is the interaction between Meclizine and Trifluoperazine?
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 sedation and anticholinergic effects, especially in older adults. Reduce the meclizine dose or choose an alternative if effects are troublesome.
What other medicines interact with Meclizine?
MediHelp also lists interactions of Meclizine with, for example, Belladonna and opium, Benzhydrocodone / acetaminophen, Brexanolone. The full list is on the Meclizine page.
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