Dexamethasone (Endocrine Sciences)
Collect SST, red top, lavender EDTA or green top (Heparin) tube. Centrifuge within 1 hour, transfer serum/plasma to screw top plastic vial and indicate sample type on transport tube.
Mass spectrometry (MS)
Room temp: 6 days, Refrigerated: 14 days, Frozen: 1 year
Measurement of Dexamethasone is useful in assuring compliance with Dexamethasone treatment.