Drug interactions
Anticholinergic / sedative combos + Thioridazine
Severity: Moderate
Anticholinergic / sedative combos and Thioridazine: 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
Anticholinergic-sedative products combined with thioridazine add anticholinergic burden and CNS depression, which may cause confusion, urinary retention, constipation and drowsiness. Oral anticholinergics may also slow gastric emptying and modestly alter thioridazine absorption.
What this interaction means in plain words
Anticholinergic / sedative combos and Thioridazine 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, with possible reduced gastrointestinal absorption.
What to do
Monitor for anticholinergic toxicity and oversedation, especially in older adults, and use the lowest effective doses.
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 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 Anticholinergic / sedative combos with Thioridazine?
MediHelp rates the interaction as moderate. Anticholinergic / sedative combos and Thioridazine 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. Anticholinergic-sedative products combined with thioridazine add anticholinergic burden and CNS depression, which may cause confusion, urinary retention, constipation and drowsiness. Oral anticholinergics may also slow gastric emptying and modestly alter thioridazine absorption.
How serious is the interaction between Anticholinergic / sedative combos and Thioridazine?
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 oversedation, especially in older adults, and use the lowest effective doses.
What other medicines interact with Thioridazine?
MediHelp also lists interactions of Thioridazine with, for example, Abiraterone, Adagrasib, Amiodarone. The full list is on the Thioridazine page.
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