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MYSOLINE vs OXTELLAR XR

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated October 9, 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.

Rating

74/100
72/100

Pharmacy pays

~$2.89 /30
~$5.03 /30

Type

RX
RX

Active ingredient

PRIMIDONE
OXCARBAZEPINE

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

Frequently asked questions

Which is better-rated, Mysoline or Oxtellar XR?

By our independent rating, Mysoline scores higher — 3.7 vs 3.6 out of 5 for Oxtellar XR. Ratings are based on FDA regulatory (recall-safety) data.

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.