MYSOLINE vs SEZABY

Independent side-by-side comparison.

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

Possible drug interaction. MYSOLINE and SEZABY 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	SEZABY
Rating	74/100	New
Pharmacy pays	~$2.89 /30	~$3.19 /30
Type	RX	RX
Active ingredient	PRIMIDONE	PHENOBARBITAL SODIUM
Manufacturer	Valeant Pharm Intl	Sun Pharm Inds Inc
Dosage forms	Tablet	Injectable
Drug class	Anti-Epileptic Agent	—
Boxed warning	None	Boxed warning
Treats	Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor	Febrile Seizures, Partial Epilepsies, Tonic-Clonic Epilepsy

mysoline sezaby

Rating

74/100

New

Pharmacy pays

~$2.89 /30

~$3.19 /30

Type

Active ingredient

PRIMIDONE

PHENOBARBITAL SODIUM

Manufacturer

Valeant Pharm Intl

Sun Pharm Inds Inc

Dosage forms

Tablet

Injectable

Drug class

Anti-Epileptic Agent

—

Boxed warning

None

Boxed warning

Treats

Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor

Febrile Seizures, Partial Epilepsies, Tonic-Clonic Epilepsy

Frequently asked questions

Which is cheaper, Mysoline or Sezaby?

Mysoline costs pharmacies less to acquire — about $2.89 vs $3.19 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 Sezaby?

Mysoline contains Primidone, while Sezaby contains Phenobarbital 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.