Drug interactions
Meclizine + Thiothixene
Severity: Moderate
Meclizine and Thiothixene: 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
Thiothixene is an antipsychotic with sedative and some anticholinergic effects, and meclizine adds antimuscarinic and sedative load. The combination can cause drowsiness, dry mouth, constipation, urinary retention and confusion.
What this interaction means in plain words
Meclizine and Thiothixene 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, particularly in elderly patients. Use the lowest effective meclizine dose.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Meclizine and Thiothixene, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Meclizine
Frequently asked questions
Can I take Meclizine with Thiothixene?
MediHelp rates the interaction as moderate. Meclizine and Thiothixene 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. Thiothixene is an antipsychotic with sedative and some anticholinergic effects, and meclizine adds antimuscarinic and sedative load. The combination can cause drowsiness, dry mouth, constipation, urinary retention and confusion.
How serious is the interaction between Meclizine and Thiothixene?
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, particularly in elderly patients. Use the lowest effective meclizine dose.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
