Active Ingredient: Phenytoin
Phenytoin has also been employed in the treatment of trigeminal neuralgia but it should only be used as second line therapy if carbamazepine is ineffective or patients are intolerant to carbamazepine.
For this indication, competent medicine agencies globally authorize below treatments:
Oral
300 - 500 mg
From 150 To 250 mg 2 time(s) per day every day
The clinically effective dose has not been established in clinical trials. In adults, 300-500 mg daily given in divided doses has been reported in the literature. Dosing should be adjusted based on clinical response. Determination of serum phenytoin levels is advised. Levels of total phenytoin should not exceed 20 mcg/ml.
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