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Test Code ITRAS Itraconazole LC-MS/MS (Serum)

Clinical Indications

Patient variability in the pharmacokinetics of itraconazole
supports quantitative monitoring of blood drug levels, particularly
due to its variable absorption. Monitoring trough levels of
intraconazole and hydroxyitraconazole (the metabolite of
intraconazole) is suggested in the first 1 – 2 weeks of
treatment to ensure therapeutic levels have been achieved. Results
may be clinically useful to determine if current dosing levels
require adjustment for ongoing treatment.

Additional Test Codes

Epic Order Name: ITRACONAZOLE LC-MS/MS
(aka ITRAS)
Sunquest Order Code: ITRAS
Epic Px Code: LAB2961

Specimen Collection Type

Red-top (no additive) tube

Minimum Collection Volume

0.5 mL

Reference Range

0.1-10 mcg/mL

Critical Value

N/A

Interpretation

The successful management of transplant rejection and graft vs.
host disease (GVHD) continues to pose a
difficult challenge for physicians treating solid organ and bone
marrow transplant patients. Immunosuppressive drugs are commonly
used to prevent rejection in these patient populations. Compliance
with immunosuppressive therapy is essential to long term survival,
however provides the additional risks of infection. Therapeutic
drug monitoring of immunosuppressive medication is required due to
variable metabolism, absorption and drug interactions. By using
drug level monitoring with timely results, the physician is able to
individualize drug dosage to improve efficacy and reduce
toxicity.

Rejection Criteria

Specimens not received in the lab within 60 minutes of
collection, blood collected in any tube other than a plain red-top
(no additive) tube. Gel tubes are not acceptable.

Specimen Availability for Add-on Testing

This test cannot be added on (Critical frozen)

Specimen Stability

Frozen: 14 days
Refrigerated: Unacceptable
Ambient: Unacceptable

Day(s) Performed

Monday through Saturday

Performing Lab- Department

TUKHS-BH-Mail Outs

CPT Code

80299

LOINC Code

N/A

Test Alias

Sporanox, Serum

Additional Information / Notes

Turnaround time: Same day (within 8 – 12 hours from
receipt of specimen)