FOSPHENYTOIN SODIUM vs GRALISE

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 21, 2026·How we rate

Possible drug interaction. FOSPHENYTOIN SODIUM and GRALISE 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	FOSPHENYTOIN SODIUM	GRALISE
Rating	72/100	New
Pharmacy pays	—	~$1.22 /30
Type	RX	RX
Active ingredient	FOSPHENYTOIN SODIUM	GABAPENTIN
Manufacturer	Hikma	Almatica
Dosage forms	Injectable, Solution	Tablet
Drug class	Anti-Epileptic Agent	Anti-Epileptic Agent
Boxed warning	Boxed warning	None
Half-life	—	about 5 to 7 hours in adults with normal kidney function
Treats	Seizures, Status Epilepticus	Bipolar Disorder, Partial Epilepsies, Phobic Disorders

fosphenytoin sodium gralise

Rating

72/100

New

Pharmacy pays

—

~$1.22 /30

Type

Active ingredient

FOSPHENYTOIN SODIUM

GABAPENTIN

Manufacturer

Hikma

Almatica

Dosage forms

Injectable, Solution

Tablet

Drug class

Anti-Epileptic Agent

Boxed warning

None

Half-life

—

about 5 to 7 hours in adults with normal kidney function

Treats

Seizures, Status Epilepticus

Bipolar Disorder, Partial Epilepsies, Phobic Disorders

Frequently asked questions

What is the difference between Fosphenytoin Sodium and Gralise?

Fosphenytoin Sodium contains Fosphenytoin Sodium, while Gralise contains Gabapentin — 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.