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Item Value
Approval req'd? No
Available Stat? No
Test code LEV
Performed by Quest
Sendout? Yes
Container type Red top
Amount to Collect 2 mL blood
Sample type Serum
Preferred volume 1 mL serum
Min. Volume 0.5 mL serum
Processing notes Freeze serum at -20C. Ship frozen, Order Quest # 15142X
Units µg/mL (mcg/mL)
Normal range
Dosage Trough Peak
500 mg BID 3.1-10.0 µg/mL 10.0-25.0 µg/mL
1000 mg BID 4.9-37.1 µg/mL 30.0-40.0 µg/mL
1500 mg BID 7.0-34.0 µg/mL 36.1-70.0 µg/mL

Note: Toxic levels not established
Critical value Quest Priority-2: peak > 70 µg/mL or trough > 37 µg/mL
Synonyms Keppra
Stability Room temperature 1 day, refrigerated 2 weeks, frozen at -20C 2 months.
Turn around times test performed Monday-Saturday. Turnaround time 3-5 days
CPT coding 80177-90
LOINC code 30471-7
Last Updated 6/21/2016 12:24:24
Entry Number 1077
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