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Phenytoin (Dilantin®)

Test Code
DILAN


Preferred Specimen
Serum, 0.5 mL minimum


Instructions
Trough levels: ORAL draw immediately prior to next dose;   IV 2-4 hours after load


Transport Container
SST tube


Transport Temperature
Specimen stable separated: 8 hours at room temp., 2 days refrigerated and longer if frozen


Reference Range
See report for normal ranges. Critical Value: >30 ug/mL


Clinical Significance
Phenytoin is considered the drug of choice for generalized major motor (grand mal epilepsy) and focal seizures.




The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.