HORIZANT vs MYSOLINE

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated October 10, 2026·How we rate

Possible drug interaction. HORIZANT and MYSOLINE 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	HORIZANT	MYSOLINE
Rating	72/100	74/100
Pharmacy pays	—	~$2.89 /30
Type	RX	RX
Active ingredient	GABAPENTIN ENACARBIL	PRIMIDONE
Manufacturer	Azurity	Valeant Pharm Intl
Dosage forms	Tablet, extended release	Tablet
Drug class	—	Anti-Epileptic Agent
Boxed warning	None	None
Half-life	about 5 to 7 hours in adults with normal kidney function	—
Treats	Bipolar Disorder, Partial Epilepsies, Phobic Disorders	Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor

horizant mysoline

Rating

72/100

74/100

Pharmacy pays

—

~$2.89 /30

Type

Active ingredient

GABAPENTIN ENACARBIL

PRIMIDONE

Manufacturer

Azurity

Valeant Pharm Intl

Dosage forms

Tablet, extended release

Tablet

Drug class

—

Anti-Epileptic Agent

Boxed warning

None

Half-life

about 5 to 7 hours in adults with normal kidney function

—

Treats

Bipolar Disorder, Partial Epilepsies, Phobic Disorders

Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor

Frequently asked questions

Which is better-rated, Horizant or Mysoline?

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

What is the difference between Horizant and Mysoline?

Horizant contains Gabapentin Enacarbil, while Mysoline contains Primidone — 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.