Drug interactions
Brimonidine + Zonisamide
Severity: Minor
Brimonidine 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
Brimonidine can cause drowsiness and fatigue through systemic absorption, which may add to the sedation of zonisamide. Ophthalmic systemic exposure is low so the effect is likely small.
What this interaction means in plain words
Brimonidine 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.
Brimonidine belongs to Miscellaneous; Zonisamide belongs to Central Nervous System.
Why it happens
Possible additive CNS depression; systemic exposure from eye drops is low.
What to do
No routine change is needed. Counsel on drowsiness and review if sedation becomes 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
Other interactions of Brimonidine
- Brimonidine + Isocarboxazid Contraindicated
- Brimonidine + Linezolid Contraindicated
- Brimonidine + Phenelzine Contraindicated
- Brimonidine + Procarbazine Contraindicated
- Brimonidine + Rasagiline Contraindicated
- Brimonidine + Selegiline Contraindicated
Frequently asked questions
Can I take Brimonidine with Zonisamide?
MediHelp rates the interaction as minor. Brimonidine 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. Brimonidine can cause drowsiness and fatigue through systemic absorption, which may add to the sedation of zonisamide. Ophthalmic systemic exposure is low so the effect is likely small.
How serious is the interaction between Brimonidine 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: No routine change is needed. Counsel on drowsiness and review if sedation becomes 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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