TRILEPTAL vs ZONISADE

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 22, 2026·How we rate

Possible drug interaction. TRILEPTAL and ZONISADE are different prescription medicines. Combining or switching between them can cause interactions — talk to a pharmacist or prescriber before making changes. This page is not medical advice.

Attribute	TRILEPTAL	ZONISADE
Rating	70/100	70/100
Pharmacy pays	~$5.03 /30	~$3.16 /30
Type	RX	RX
Active ingredient	OXCARBAZEPINE	ZONISAMIDE
Manufacturer	Novartis	Azurity
Dosage forms	Suspension, Tablet	Suspension
Drug class	Anti-Epileptic Agent	Anti-Epileptic Agent
Boxed warning	None	None
Half-life	about 2 hours (immediate-release tablets and oral suspension)	—
Treats	Partial Epilepsies	Partial Epilepsies

trileptal zonisade

Rating

70/100

Pharmacy pays

~$5.03 /30

~$3.16 /30

Type

Active ingredient

OXCARBAZEPINE

ZONISAMIDE

Manufacturer

Novartis

Azurity

Dosage forms

Suspension, Tablet

Suspension

Drug class

Anti-Epileptic Agent

Boxed warning

None

Half-life

about 2 hours (immediate-release tablets and oral suspension)

—

Treats

Partial Epilepsies

Frequently asked questions

Which is better-rated, Trileptal or Zonisade?

Trileptal and Zonisade are tied at 3.5 out of 5 by our independent rating.

Which is cheaper, Trileptal or Zonisade?

Zonisade costs pharmacies less to acquire — about $3.16 vs $5.03 for a 30-count supply, per the CMS NADAC survey. That gap is in the pharmacy's cost of goods, not necessarily in what you pay: your price is set afterwards by your insurer and the pharmacy.

What is the difference between Trileptal and Zonisade?

Trileptal contains Oxcarbazepine, while Zonisade contains Zonisamide — they have different active ingredients.

Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.