MYSOLINE vs OXTELLAR XR

Independent side-by-side comparison.

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

Possible drug interaction. MYSOLINE 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	MYSOLINE	OXTELLAR XR
Rating	70/100	New
Pharmacy pays	~$2.89 /30	~$5.03 /30
Type	RX	RX
Active ingredient	PRIMIDONE	OXCARBAZEPINE
Manufacturer	Valeant Pharm Intl	Supernus Pharms
Dosage forms	Tablet	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	Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor	Partial Epilepsies

mysoline oxtellar xr

Rating

70/100

New

Pharmacy pays

~$2.89 /30

~$5.03 /30

Type

Active ingredient

PRIMIDONE

OXCARBAZEPINE

Manufacturer

Valeant Pharm Intl

Supernus Pharms

Dosage forms

Tablet

Drug class

Anti-Epileptic Agent

Boxed warning

None

Half-life

—

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

Treats

Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor

Partial Epilepsies

Frequently asked questions

Which is cheaper, Mysoline or Oxtellar XR?

Mysoline costs pharmacies less to acquire — about $2.89 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 Mysoline and Oxtellar XR?

Mysoline contains Primidone, 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.