Reference Values

Significance of blood level is dependent on time of ingestion and elimination half life data.

Therapeutic range of 10.0 – 30.0 ug/mL may be effective for some patients while other individuals are best treated at concentrations outside this range.

> 300 ug/mL at 4 hours after ingestion and 50.0 ug/mL at 12 hours after ingestion are often associated with toxic reactions