Wednesday, July 8, 2026

Drug profile · INN

phenytoin

phenytoin (DILANTIN) is a sodium channel alpha subunit blocker. Associated with Viatris Pharmaceuticals Co.,. Route of administration: oral. Current US regulatory status: approved.

FDA: approved TGA: approved
US status approved
Patents linked 0
Pipeline programs 4
News articles 1
Drug details — phenytoin

Quick answer

phenytoin (DILANTIN) is a sodium channel alpha subunit blocker. Associated with Viatris Pharmaceuticals Co.,. Route of administration: oral. Current US regulatory status: approved.

Key facts

INN phenytoin
Brand DILANTIN
Mechanism Sodium channel alpha subunit blocker
Target Sodium channel alpha subunit
Route ORAL
Formulation TABLET, CHEWABLE

Mechanism of action

Sodium channel alpha subunit blocker

Primary target: Sodium channel alpha subunit

Approval history

Authority Status Date
FDA approved
TGA approved

Recent coverage

Pipeline programs

  1. phenytoin Phase 3 · Ultragenyx UK · Post-Traumatic Seizure Disorder
  2. CLIN-60250-450 Phase 1 · Ipsen · Not applicable
  3. Phenytoin Phase 1 · BRIGHT MINDS BIOSCIENCES · Cocaine-Related Disorders
  4. Phenytoin single dose (300 mg) Unknown · United Therapeutics Europe · Healthy

Related & competitor drugs

  1. carbamazepine Sodium channel alpha subunit blocker
  2. disopyramide phosphate Sodium channel alpha subunit blocker
  3. eslicarbazepine acetate Nervous system (N03)
  4. fosphenytoin sodium Sodium channel alpha subunit blocker
  5. lacosamide Nervous system (N03)
  6. lamotrigine Sodium channel alpha subunit blocker

Frequently asked questions

What is phenytoin?

phenytoin (DILANTIN) is a sodium channel alpha subunit blocker. Associated with Viatris Pharmaceuticals Co.,. Route of administration: oral. Current US regulatory status: approved.

What is the brand name for phenytoin?

DILANTIN is a marketed brand name for phenytoin. Check FDA Drugs@FDA for the current US label holder and prescribing information.

What is the US approval status of phenytoin?

phenytoin has approved status in the United States according to our Drugs@FDA-derived records. Verify on the official FDA label before clinical or commercial decisions.