OXTELLAR XR vs SESQUIENT

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 21, 2026·How we rate

Possible drug interaction. OXTELLAR XR and SESQUIENT 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	OXTELLAR XR	SESQUIENT
Rating	New	64/100
Pharmacy pays	~$5.03 /30	—
Type	RX	RX
Active ingredient	OXCARBAZEPINE	FOSPHENYTOIN SODIUM
Manufacturer	Supernus Pharms	Lupin
Dosage forms	Tablet	Solution
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	Seizures, Status Epilepticus

oxtellar xr sesquient

Rating

New

64/100

Pharmacy pays

~$5.03 /30

—

Type

Active ingredient

OXCARBAZEPINE

FOSPHENYTOIN SODIUM

Manufacturer

Supernus Pharms

Lupin

Dosage forms

Tablet

Solution

Drug class

Anti-Epileptic Agent

Boxed warning

None

Half-life

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

—

Treats

Partial Epilepsies

Seizures, Status Epilepticus

Frequently asked questions

What is the difference between Oxtellar XR and Sesquient?

Oxtellar XR contains Oxcarbazepine, while Sesquient contains Fosphenytoin Sodium — 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.