Red serum vial/tube, 5 mL

• Draw trough levels immediately prior to next dose.
• Do not use a gel barrier tube.
  • The use of gel-barrier tubes is not recommended due to slow absorption of the drug by the gel.
  • Depending on the specimen volume and storage time, the decrease in drug level due to absorption may be clinically significant.

1. Allow sample to clot
2. Spin within two (2) hours of sample collection
3. Transfer serum to a Transfer vial/tube with cap - 12mL (LabCorp), labelled as serum

Transfer vial/tube with cap - 12mL (LabCorp)

Lavender (EDTA), 4mL

Immediatley following collection, mix sample thoroughly by gentle inverting 8 - 10 times, to prevent clotting

1. Spin within two (2) hours of sample collection
2. Transfer plasma to a Transfer vial/tube with cap - 12mL (LabCorp), labelled as EDTA plasma

Ambient (preferred) - 14 days

Refrigerated  - 14 days

Frozen - 14 days

Freeze/thaw cycles - stable x3

• Gel barrier tube
• Gross lipemia
• Hemolysis
• Icteric specimen

Liquid Chromatography/Tandem Mass Spectrometry (LC/MS-MS)

See report

Medical necessity