Therapeutic drug management
Trough levels are most reproducible
Refrigerated (preferred)
Ambient (OK) - 3 days
Frozen (OK)
Gas Chromatography/Flame Ionization Detection (GC-FID)
8.0 - 20.0 µg/mL
The therapeutic range for ethotoin is not well established. Many patients respond well to Ethotoin concentrations up to 60 µg/mL