The Antiepileptic drug, Phenytoin therapeutic blood level is

(B) 10-19 mcg/ml# SERUM PHENYTOIN LEVELS:> Therapeutic range is 10-20 mcg/mL.# Total phenytoin levels (mcg/mL) - Typical corresponding Signs & Symptoms: Lower than 10- Rare Between 10 and 20 - Occasional mild nystagmus Between 20 and 30 - Nystagmus Between 30 and 40 - Ataxia, slurred speech, nausea, and vomiting Between 40 and 50 - Lethargy and confusion Higher than 50 - Coma and seizures