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Laboratory Medicine

Test catalogue

Tacrolimus (FK506, Prograf)

Test Name

Tacrolimus (FK506, Prograf)

Lavender Tube Specimen type/requirements

Container Type = 1 Lavender Top

Minimum Volume = 3 ml Blood

Specimen Handling

Collection Instructions: Collect sample in Lavendar top tube. Invert tube 5-6 times gently after collection. Record time of collection and time of last dose. Write your initials, date and time of collection on the collection label or requisition.

Laboratory Staff Instructions: Specimens must be mixed thoroughly after thawing to ensure consistency of results. Do not use heat-inactivated samples. Do not use samples and controls stabilized with azide.

Rejection Criteria: Gel separator, grossly hemolyzed and icteric samples, Unlabeled or Not Sufficient Quantity samples will be rejected.

Stability: Stable for up to 5 days at 15-25◦C, 7 days at 2-8◦C or 6 months at -20◦C

Transportation: Send sample to core lab as soon as possible.

Required Documentation

Turnaround Time (TAT)

Same day

Test Utilization

Reference Value

Therapeutic: 3-12 ug/L

Toxic:> 25 ug/L

Test Code



Competitive Binding Immunoenzymatic
Assay or LCMS/MS

Testing Location


Other Information

Last Updated: September 26, 2019