Flurazepam and Desalkylflurazepam, Serum or Plasma
Therapeutic drug management
Serum or plasma, frozen
Red-top tube or green-top (heparin) tube. Gel-barrier tubes are not recommended.
Serum or plasma should be separated from cells immediately. Transfer separated serum or plasma to a plastic transport tube and freeze immediately
Freeze immediately; ship on dry ice.
Gel-barrier tubes; sample not received frozen