Sign in →

Test Code LAB4046 CARBAMAZEPINE LEVEL, TOTAL

Specimen Type

Preferred Specimen: Lithium Heparin tube (Mint Green Top, Dark Green Top)
Alternative Specimen: Serum Tube (SST, Gold, Corvac, Tiger, Red Top Tube)

Collection Instructions

Draw sample just prior to next dose. Note times of dose and drawing.

Specimen Volume

1 mL

Minimum Volume

0.5 mL

Turnaround Time

STAT: 1 hour
Routine: 4 hours

Test Schedule

Daily

Sample Stability

Room Temperature: 2 days
Refrigerated: 7 days
Frozen: 1 month

Method

Photometric

Reference Ranges

Carbamazepine µg/mL

Therapeutic 4.0 - 12.0

Toxic > 13.0

*Toxicity can also be seen at lower levels with combined therapy.

Synonyms

Tegretol

Test Components

Carbamazepine, µg/mL.

LOINC Code

3432-2

IMO Code

IMO-PROC-30998370

CPT Codes

80156

Test Limitations

Studies have shown that therapeutic drug levels may be altered in serum/plasma that remains in contact with separator gel. Therapeutic drug levels collected in an SST or PST should be run within 24 hrs of collection.