Lamotrigine (Lamictal) Drug Level
|Pink top tube 6 mL (K2-EDTA)
Call laboratory for additional acceptable specimen collection containers.
5 mL pink top tube (adults) or TWO EDTA Microtainer®
devices (pediatric patients).
Gel separator tubes
24 hrs/day, 7 days a week, including holidays.
1 hour (upon receipt in laboratory)
Therapeutic range: 3 - 14 mcg/mL.
The proposed therapeutic range for seizure control is 3 - 14 μg/mL.
Concentrations that exceed 15 μg/mL may contribute to adverse
effects. Pharmacokinetics varies widely, particularly with co-
medications and/or compromised renal function.
Hemolysis: No significant interference up to an H index of 1000
(approximate hemoglobin concentration: 1000 mg/dL).
Lipemia: No significant interference up to an L index of 1000
(approximate triglycerides concentration: 2000 mg/dL). Note there is
poor correlation between turbidity and triglyceride
Icterus: No significant interference up to an I index of 70
(approximate conjugated and unconjugated bilirubin concentration: 70