Drug interactions
Olopatadine intranasal + Thioridazine
Severity: Moderate
Olopatadine intranasal 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
Both agents can cause sedation, and together they may produce additive drowsiness and impaired psychomotor performance. Systemic absorption of intranasal olopatadine is limited, so the effect is usually modest, but it may be noticeable with higher thioridazine doses.
What this interaction means in plain words
Olopatadine intranasal 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 central nervous system depression from antihistaminic and antipsychotic sedative effects.
What to do
Counsel the patient about drowsiness and caution with driving or machinery. Reduce the olopatadine dose or use a non-sedating alternative if impairment occurs.
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 Olopatadine intranasal with Thioridazine?
MediHelp rates the interaction as moderate. Olopatadine intranasal 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. Both agents can cause sedation, and together they may produce additive drowsiness and impaired psychomotor performance. Systemic absorption of intranasal olopatadine is limited, so the effect is usually modest, but it may be noticeable with higher thioridazine doses.
How serious is the interaction between Olopatadine intranasal 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: Counsel the patient about drowsiness and caution with driving or machinery. Reduce the olopatadine dose or use a non-sedating alternative if impairment occurs.
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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