Many experts choose one of the following: Fosphenytoin 15 to 20 mg / kg PE (phenytoin equivalents) mg / kg IV, given at a rate of 100 to 150 PE / min Phenytoin 15 to 20 mg / kg IV, given at a rate of 50 mg / minute Levetiracetam 1500 to 3000 mg IV over 25 minutes, then 1500 mg orally 2 times a day (1) Valproate 20 to 40 mg / kg IV (loading dose) over 30 minutes followed by 4 to 8 mg / kg orally 3 times a day The dose of fosphenytoin is given in phenytoin equivalents (PE); fosphenytoin 1.5 mg is equivalent to phenytoin 1 mg.