PRIMIDONE vs VALPROATE SODIUM

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 23, 2026·How we rate

Possible drug interaction. PRIMIDONE and VALPROATE SODIUM 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	PRIMIDONE	VALPROATE SODIUM
Rating	70/100	70/100
Pharmacy pays	~$2.89 /30	—
Type	RX	RX
Active ingredient	PRIMIDONE	VALPROATE SODIUM
Manufacturer	Amneal	Sagent
Dosage forms	Tablet	Injectable, Solution
Drug class	Anti-Epileptic Agent	Anti-Epileptic Agent
Boxed warning	None	Boxed warning
Half-life	—	about 9 to 16 hours (the label's mean terminal, or elimination, half-life for valproate monotherapy after oral doses of 250 to 1,000 mg)
Treats	Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor	—

primidone valproate sodium

Rating

70/100

Pharmacy pays

~$2.89 /30

—

Type

Active ingredient

PRIMIDONE

VALPROATE SODIUM

Manufacturer

Amneal

Sagent

Dosage forms

Tablet

Injectable, Solution

Drug class

Anti-Epileptic Agent

Boxed warning

None

Boxed warning

Half-life

—

about 9 to 16 hours (the label's mean terminal, or elimination, half-life for valproate monotherapy after oral doses of 250 to 1,000 mg)

Treats

Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor

—

Frequently asked questions

Which is better-rated, Primidone or Valproate Sodium?

Primidone and Valproate Sodium are tied at 3.5 out of 5 by our independent rating.

What is the difference between Primidone and Valproate Sodium?

Primidone contains Primidone, while Valproate Sodium contains Valproate 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.