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Item Value
Approval req'd? No
Available Stat? No
Test code ETHO
Performed by Quest
Sendout? Yes
Method FPIA
Collection Instructions Time to steady state: 4-7 days

Do NOT use a serum separator tube (Gold top) to collect the specimen. Indicate the time of draw on the requisition.

Optimum time for sample collection 4 hours post oral dose.
Container type Red top (Lavender acceptable)
Amount to Collect 2 mL blood
Sample type Serum (Plasma acceptable)
Preferred volume 1 mL serum or plasma
Min. Volume 0.5 mL serum or plasma
UCSF Rejection Criteria Collected in Gold top
Processing notes Freeze separated serum. Order Quest # 36160P.
Units mg/L
Normal range
Therapeutic 40-100 mg/L
Potentially toxic > 150 mg/L
Critical value UCSF: > 200 mg/L
Quest Priority-1: ≥ 150 mg/L
Synonyms Zarontin
Stability Room temperature 4 days, refrigerated 2 weeks, frozen at -20C 1 month
Turn around times Set up 6x per week. Turnaround 3-4 days
Additional information Click here for: A Guide on Drug Level Monitoring
CPT coding 80168-90
LOINC code 3616-0
Last Updated 6/21/2016 08:19:17
Entry Number 353
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