What is Fosphenytoin used for?

This medication is an anticonvulsant, prescribed for seizures during neurosurgery and status epilepticus. It works in the brain to block the spread of seizure activity.

How does Fosphenytoin work?

USDailyMed:Fosphenytoin N03AB05(WHO) CA:℞-onlyUS:℞-onlyIn general: ℞ (Prescription only) (2,5-Dioxo-4,4-diphenyl-imidazolidin-1-yl)methoxyphosphonic acid 93390-81-9Y 56339 7190 DB01320Y 50839Y B4SF212641 D07993Y ChEMBL919N DTXSID9044299 Interactive image O=C3N(C(=O)C(c1ccccc1)(c2ccccc2)N3)COP(=O)(O)O InChI=1S/C16H15N2O6P/c19-14-16(12-7-3-1-4-8-12,13-9-5-2-6-10-13)17-15(20)18(14)11-24-25(21,22)23/h

What pharmaceutical form is Fosphenytoin available in?

Fosphenytoin: INJECTION, SOLUTION 50 mg/mL (INTRAMUSCULAR, INTRAVENOUS)

What are the side effects of Fosphenytoin?

Heart - Low blood pressure, dilatation of blood vessels and fast heart beat. Central Nervous System - Involuntary eye movement, dizziness, drowsiness, unsteadiness, tremor, headache, incoordination, stupor, weakness, increase in muscle tone, abnormal movements, tingling, agitation, decreased reflexes, brain edema, speech disorder, sensory loss, vertigo, abnormal thinking, increased reflexes, intracranial hypertension and nervousness. Skin - Itching, face edema, rash. Eye and ENT - perception

Does Fosphenytoin interact with other medications?

Some drugs could change the level of fosphenytoin in the blood and result in the patient having no effect of the drug or experiencing side effects. Inform your doctor of all medications you are taking before starting fosphenytoin.

What precautions should be taken with Fosphenytoin?

•It may cause dizziness or drowsiness, do not drive a car or operate machinery while taking this medication. • Caution should be exercised in patients with history of heart problem, liver or kidney disease, low blood albumin levels, diabetes, alcoholism, elderly, patients requiring phosphate restriction. • Resuscitation facilities must be available. • Monitor ECG, BP, blood sugar, and respiratory function during infusion; observe patients for at least 30 minutes after infusion. • IV

Who manufactures Fosphenytoin?

GLENMARK PHARMACEUTICALS INC., USA

What ATC class does Fosphenytoin belong to?

Fosphenytoin: ATC N03AB02. ATC is the WHO Anatomical Therapeutic Chemical classification — it groups drugs by organ system and pharmacological mechanism.

OTC

Fosphenytoin

50 mg/mL, Injection, solution

INN: FOSPHENYTOIN SODIUM

Data updated: 2026-05-14

Available in:

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Form

INJECTION, SOLUTION

Dosage

50 mg/mL

Route

INTRAMUSCULAR, INTRAVENOUS

Storage

—

About This Product

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