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Test Code LAB475 Lamotrigine

Clinical System Name

Lamotrigine Level

Synonyms

Lamictal

Lamotrigine

Sample Requirements

Specimen: Whole blood

Container(s): Gold SST, Gold Microtainer, Lt. Green/Li Heparin Microtainer, Dark Green/Sodium Heparin, Red

Preferred Vol: 1 mL

Minimum Vol: 1 mL

 

Note: Trough level preferred. Volume can be shared with Gabapentin, Lacosamide, Levetiracetam (Keppra), Oxcarbazepine, Topiramate, Zonisamide, and Rufinamide.

 

 

 

Processing Instructions

Reject due to: 

Spin: Y

Aliquot: Y

Temp: 2-8 C

Storage location: Refrigerate serum or plasma with labels in CPA refrigerator, FrigE rack. May be stored in same tube with Gabapentin, Lacosamide, Levetiracetam (Keppra), Oxcarbazepine, Topiramate, Zonisamide, and Rufinamide.

 

Off-site collection: Spin blood; refrigerate serum/plasma in plastic aliquot tube. Avoid freeze/thaw cycles.

 

Note: Remove from gel separator within 2 h. 

Stability

Specimen Type Temperature Time
gel separator serum or plasma  Room temp 2 h
separated serum or plasma Room temp 2 d
  Refrigerated 6 w
  Frozen 3 m

 

Availability

STAT Performed TAT
N T, Th, Su (run overnight, result available next day) 2 - 4 d

 

Performing Laboratory

Seattle Children's Laboratory    

 

Department

Department:  Chemistry

Location: Chem West

Phone Number: 206-987-2617

 

 

 

CPT Codes

80175

 

Methodology

Method: LC/MS/MS

Analytical Volume: 0.3 mL serum or plasma

Limitations:

 

Note: Volume can be shared with Gabapentin, Keppra, Oxcarbazepine, Topiramate, Lamictal, Zonisamide, and Rufinamide.

Reference Range

Therapeutic range: 3 - 14 mcg/mL

Critical Value

> 20 mcg/mL