Phenytoin - Indications, Dosage, Side Effects and Precautions

Hypersensitivity.

Adult: PO- Initial: 3-4 mg/kg/day as single dose or in divided doses. Maintenance: 200-500 mg/day.
IV- As adjunct with a benzodiazepine: 10-15 mg/kg. Maintenance: 100 mg 6-8 hourly.

It comes as a tablet to take by mouth, capsule and suspension to take by mouth, with food.
It comes as a solution for injection to be administered by a healthcare provider into the vein.

•   Central Nervous System : Night blindness, incoordination, slurred speech, decreased coordination, mental confusion, dizziness, sleeplessness and tremor.
•   Gastrointestinal : Nausea, vomiting, constipation, toxic hepatitis, and liver damage.
•   Blood : Decrease in white blood cells and platelets.
•   Skin : Skin damage, rash and itching.

Avoid excess dosage.

Store it at room temperature (20-25°C).