MYSOLINE vs VIRAC REX

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated September 29, 2026·How we rate

Possible drug interaction. MYSOLINE and VIRAC REX 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	VIRAC REX
Rating	74/100	New
Pharmacy pays	~$2.89 /30	—
Type	RX	RX
Active ingredient	PRIMIDONE	LAPYRIUM CHLORIDE AND UNDECOYLIUM CHLORIDE IODINE COMPLEX
Manufacturer	Valeant Pharm Intl	Chesebrough Ponds
Dosage forms	Tablet	Solution
Drug class	Anti-Epileptic Agent	—
Boxed warning	None	None
Treats	Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor	—

mysoline virac rex

Rating

74/100

New

Pharmacy pays

~$2.89 /30

—

Type

Active ingredient

PRIMIDONE

LAPYRIUM CHLORIDE AND UNDECOYLIUM CHLORIDE IODINE COMPLEX

Manufacturer

Valeant Pharm Intl

Chesebrough Ponds

Dosage forms

Tablet

Solution

Drug class

Anti-Epileptic Agent

—

Boxed warning

None

Treats

Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor

—

Frequently asked questions

What is the difference between Mysoline and Virac Rex?

Mysoline contains Primidone, while Virac Rex contains Lapyrium Chloride and Undecoylium Chloride Iodine Complex — 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.