CELONTIN vs OXTELLAR XR

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated June 7, 2026·How we rate

Possible drug interaction. CELONTIN and OXTELLAR XR 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	CELONTIN	OXTELLAR XR
Rating	New	New
Pharmacy pays	—	~$5.03 /30
Type	RX	RX
Active ingredient	METHSUXIMIDE	OXCARBAZEPINE
Manufacturer	Parke Davis	Supernus Pharms
Dosage forms	Capsule	Tablet
Drug class	Anti-Epileptic Agent	Anti-Epileptic Agent
Boxed warning	None	None
Half-life	—	about 2 hours (immediate-release tablets and oral suspension)
Treats	Absence Epilepsy	Partial Epilepsies

celontin oxtellar xr

Rating

New

Pharmacy pays

—

~$5.03 /30

Type

Active ingredient

METHSUXIMIDE

OXCARBAZEPINE

Manufacturer

Parke Davis

Supernus Pharms

Dosage forms

Capsule

Tablet

Drug class

Anti-Epileptic Agent

Boxed warning

None

Half-life

—

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

Treats

Absence Epilepsy

Partial Epilepsies

Frequently asked questions

What is the difference between Celontin and Oxtellar XR?

Celontin contains Methsuximide, while Oxtellar XR contains Oxcarbazepine — 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.