Template:Phenytoin toxicity level chart

Toxicity symptoms by phenytoin level^

Level	Sypmtoms
>10	Usually no symptoms
10-20	Occasional mild nystagmus
20-30	Nystagmus
30-40	Ataxia, slurred speech, Nausea/vomiting
40-50	Lethargy, confusion
>50	Coma, seizure (rare)

^Provides a rough guide only; neither sensitive nor specific