Drug interactions
Olopatadine intranasal + Zonisamide
Severity: Minor
Olopatadine intranasal and Zonisamide: minor 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
Intranasal olopatadine is an antihistamine that can cause somnolence. Together with zonisamide, which is also sedating, the effects on alertness and psychomotor performance may be additive, though systemic exposure from the nasal spray is limited.
What this interaction means in plain words
Olopatadine intranasal and Zonisamide have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Additive CNS depressant effects.
What to do
Advise patients to watch for drowsiness and to avoid driving or hazardous tasks until the response is known. Reduce olopatadine use if sedation is troublesome.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Zonisamide
- Zonisamide + Zuranolone Major
- Acetazolamide + Zonisamide Moderate
- Amisulpride + Zonisamide Moderate
- Amobarbital + Zonisamide Moderate
- Apalutamide + Zonisamide Moderate
- Asenapine transdermal + Zonisamide Moderate
Frequently asked questions
Can I take Olopatadine intranasal with Zonisamide?
MediHelp rates the interaction as minor. Olopatadine intranasal and Zonisamide have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Intranasal olopatadine is an antihistamine that can cause somnolence. Together with zonisamide, which is also sedating, the effects on alertness and psychomotor performance may be additive, though systemic exposure from the nasal spray is limited.
How serious is the interaction between Olopatadine intranasal and Zonisamide?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Advise patients to watch for drowsiness and to avoid driving or hazardous tasks until the response is known. Reduce olopatadine use if sedation is troublesome.
What other medicines interact with Zonisamide?
MediHelp also lists interactions of Zonisamide with, for example, Zuranolone, Acetazolamide, Amisulpride. The full list is on the Zonisamide page.
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