| Ordering Code | 5462 |
|---|---|
| Test Name | Tacrolimus |
| Alias | FK506 Prograf Fujimycin Envarsus XR Astagraf XL Protopic |
| Preferred Specimen | Whole Blood |
| Preferred Container | EDTA, K2 (Lavender) |
| Optimum Volume | 1 mL |
| Handling Instructions | Do NOT centrifuge specimen Do NOT induce foaming of samples. |
| Transport Requirements | Oahu: Refrigerated Airline: Refrigerated Send frozen if transport >7 Days |
| Specimen Stability | Refrigerated: 7 Days Frozen: 6 Months Frozen samples should be thawed only once DO NOT refreeze. |
| Rejection Criteria | Clotted, Insufficient quantity, Specimen older than stability limits, Over or under filled tube, Refrozen specimen, Spun down specimen |
| Avail. Stat | NO |
| Analytic Time | 1 Day |
| Methodology | Homogeneous particle-enhanced turbidimetric immunoassay |
Reference range(s)
The reference ranges listed below are valid on this date of March 10, 2026.
| Component | Age | Male Norm | Male Critical Low | Male Critical High | Female Norm | Female Critical High | Female Critical Low | Units | Add'l info |
|---|---|---|---|---|---|---|---|---|---|
| Tacrolimus | ALL | 5.0-20.0 | 5.0-20.0 | ng/mL | This test was... Note1 |
Note1:
This test was performed using homogeneous particle turbidimetric immunoassay on the Beckman Coulter analyzer. Values obtained with a different assay cannot be used interchangeably due to differences in assay method and cross-reactivity with metabolites
Consistent use of one assay for individual patients is recommended
.