Test Name
PHENYTOIN
Aliases
DILANTIN, EPANUTIN, EPTOIN
Abbreviations
-
Test Classification
INDIVIDUAL
Department
SPECIAL CHEMISTRY
Sub Department
-
TAT Category
BUSINESS (WORKING) TIME
Estimated TAT
96
TAT Units
HOURS
Test Requirements
Collect a trough (pre-dose) serum sample. If patient has been on the same dose of the drug for at least 6 days, a random collection can be done. TDM request form details should be captured & filled out in entirety. AVOID gel (SST) tubes.
SHIPPING/ TRANSPORTATION REQUIREMENTS
Shipping Temperature: Refrigerated
ANALYTE STABILITY
Room Temperature: 2 days at 20-25°C │ Refrigerated: 1 month at 2-8°C │ Frozen: 5 months at -20°C
Clinical Utility
Optimize drug dosage (to avoid sub-therapeutic & toxic doses i.e. ensure target therapeutic range is achieved); to verify compliance.
Last Review
26th Feb 2026