MYSOLINE vs VASCEPA

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated October 8, 2026·How we rate

Possible drug interaction. MYSOLINE and VASCEPA 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	VASCEPA
Rating	74/100	New
Pharmacy pays	~$2.89 /30	~$13.27 /30
Type	RX	RX
Active ingredient	PRIMIDONE	ICOSAPENT ETHYL
Manufacturer	Valeant Pharm Intl	Amarin Pharms
Dosage forms	Tablet	Capsule
Drug class	Anti-Epileptic Agent	—
Boxed warning	None	None
Treats	Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor	—

mysoline vascepa

Rating

74/100

New

Pharmacy pays

~$2.89 /30

~$13.27 /30

Type

Active ingredient

PRIMIDONE

ICOSAPENT ETHYL

Manufacturer

Valeant Pharm Intl

Amarin Pharms

Dosage forms

Tablet

Capsule

Drug class

Anti-Epileptic Agent

—

Boxed warning

None

Treats

Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor

—

Frequently asked questions

Which is cheaper, Mysoline or Vascepa?

Mysoline costs pharmacies less to acquire — about $2.89 vs $13.27 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 Vascepa?

Mysoline contains Primidone, while Vascepa contains Icosapent Ethyl — 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.