Question 1

What is Zonisamide used for?

Accepted Answer

Zonisamide is indicated for: Epilepsy, Epilepsy (adjunctive).

Question 2

What routes can Zonisamide be administered by?

Accepted Answer

Available routes: PO.

Question 3

Which species have cited Zonisamide dosing data?

Accepted Answer

Zonisamide dosing in the ExoticRx formulary covers 2 species: Cat (Domestic), Dog (Domestic).

Question 4

Is Zonisamide a controlled substance?

Accepted Answer

Zonisamide is not federally scheduled as a controlled substance, but is veterinary prescription only in most jurisdictions.

Question 5

What are the warnings or contraindications for Zonisamide?

Accepted Answer

Second-line anticonvulsant or add-on therapy. Sedation, ataxia, GI upset. Decreased appetite in some dogs. Renal tubular acidosis reported (rare). Monitor serum levels. Dogs and cats.

Question 6

What are the side effects of Zonisamide?

Accepted Answer

Second-line anticonvulsant or add-on therapy. Sedation, ataxia, GI upset. Decreased appetite in some dogs. Renal tubular acidosis reported (rare). Monitor serum levels. Dogs and cats.

Question 7

How does Zonisamide work?

Accepted Answer

Multiple mechanisms: blocks voltage-gated sodium and T-type calcium channels, enhances GABA release, and has mild carbonic anhydrase inhibitory activity.

Species	Route	Dose	Frequency	Evidence	Source
Dog (Domestic)	PO	5–10 mg/kg	q12h	Moderate	Plumb's Veterinary Drug Handbook, 9th Ed
Cat (Domestic)	PO	5–10 mg/kg	q24h	Moderate	Plumb's Veterinary Drug Handbook, 9th Ed

Zonisamide

Drug Class

Routes

Indications

Mechanism of Action

Side effects & warnings

Species with Zonisamide dosing data (2 dose rules)

Evidence levels across 2 dose rules

Backed by a published primary source

Sample dosing (2 of 2 cited rules)

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