Drug interactions
Meclizine + Protriptyline
Severity: Moderate
Meclizine and Protriptyline: 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
Protriptyline is a tricyclic antidepressant with substantial anticholinergic activity, and meclizine adds further antimuscarinic and sedative effects. This can cause dry mouth, constipation, urinary retention, tachycardia and confusion, especially in older adults.
What this interaction means in plain words
Meclizine and Protriptyline 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 sedative effects.
What to do
Monitor for anticholinergic toxicity and cognitive effects, and lower doses or substitute a less anticholinergic option if needed.
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 Protriptyline?
MediHelp rates the interaction as moderate. Meclizine and Protriptyline 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. Protriptyline is a tricyclic antidepressant with substantial anticholinergic activity, and meclizine adds further antimuscarinic and sedative effects. This can cause dry mouth, constipation, urinary retention, tachycardia and confusion, especially in older adults.
How serious is the interaction between Meclizine and Protriptyline?
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 cognitive effects, and lower doses or substitute a less anticholinergic option if needed.
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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