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Tacrolimus, Trough

Item Value
Approval req'd? No
Available Stat? No
Test code TAC
Performed by China Basin Chemistry
In House Availability Daily (day shift)
Method Chemiluminescent Immunoassay - Abbott Architect
Collection Instructions Time to steady state: 3 doses

Collect trough samples no more than 30-60 minutes before AM dose. Samples should not be drawn from any line through which the drug has been infused but only from a peripheral site.

Specimens must be received in the laboratory by 1200 (Monday-F) or 1000 (Weekends and holidays) for same day results.
Container type Lavender top
Amount to Collect 3 mL blood
Sample type EDTA whole blood
Preferred volume 3 mL blood
Min. Volume 0.3 mL blood

This volume does not allow for repeat testing if needed.
UCSF Rejection Criteria Samples collected outside of stated time frames
Units µg/L
Normal range
Therapeutic trough 5 -15 µg/L
Synonyms Prograf; FK 506; FK506; Hecoria
Stability Refrigerated 1 week.
Turn around times For samples received by 1200 (Monday-Friday) and 1000 (weekends and holidays) the results will be available by 1600. Results for samples that miss the cut-off times will be available the following day.
Additional information Click here for: A Guide on Drug Level Monitoring
CPT coding 80197
LOINC code 11253-2
Last Updated 5/1/2017 2:35:13 PM
Entry Number 883
Lab Procedure Link Click here for Procedure
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