Specimen Requirements
Collection Instructions
Collect specimen in red top tube; do not use SST tube. Centrifuge, aliquot serum or plasma into a plastic vial and refrigerate up to 24 hours or freeze for longer storage. Collect Peak specimen 30 minutes after the end of an I.V. infusion (one hour following I.M. or oral administration) or Trough specimen immediately before next dose is given.
Alternate Specimen
Heparinized plasma acceptable. [6/09]
Rejection Criteria
SST tube not acceptable.
Normal Volume
1 mL serum
Minimum Volume
0.6 mL serum