Drug interactions
Thioridazine + Triprolidine
Severity: Moderate
Thioridazine and Triprolidine: 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 drugs are sedating and anticholinergic, so combined use increases drowsiness and anticholinergic effects. Thioridazine also carries a notable risk of QT prolongation, so any additional drug that adds to cardiac or CNS burden warrants care.
What this interaction means in plain words
Thioridazine and Triprolidine 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.
Thioridazine belongs to Central Nervous System; Triprolidine belongs to Respiratory.
Why it happens
Additive CNS depression and antimuscarinic effects from H1, muscarinic and dopamine receptor blockade.
What to do
Monitor for oversedation and anticholinergic toxicity, and check electrolytes and QT as indicated for thioridazine. Use a non-sedating antihistamine.
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 Thioridazine and Triprolidine, 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 Triprolidine
Other interactions of Thioridazine
- Abiraterone + Thioridazine Contraindicated
- Adagrasib + Thioridazine Contraindicated
- Amiodarone + Thioridazine Contraindicated
- Amisulpride + Thioridazine Contraindicated
- Amitriptyline + Thioridazine Contraindicated
- Amoxapine + Thioridazine Contraindicated
Frequently asked questions
Can I take Thioridazine with Triprolidine?
MediHelp rates the interaction as moderate. Thioridazine and Triprolidine 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 drugs are sedating and anticholinergic, so combined use increases drowsiness and anticholinergic effects. Thioridazine also carries a notable risk of QT prolongation, so any additional drug that adds to cardiac or CNS burden warrants care.
How serious is the interaction between Thioridazine and Triprolidine?
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 oversedation and anticholinergic toxicity, and check electrolytes and QT as indicated for thioridazine. Use a non-sedating antihistamine.
What other medicines interact with Triprolidine?
MediHelp also lists interactions of Triprolidine with, for example, Belladonna and opium, Benzhydrocodone / acetaminophen, Brexanolone. The full list is on the Triprolidine 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.
