Demerol®
8 days
Liquid chromatography/tandem mass spectrometry (LC/MS-MS)
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Opioid drug level. Used in pain management and toxicity screening.
Serum or Plasma
1 mL
Red-top tube, lavender-top (EDTA) tube, OR green-top (heparin) tube.
No special preparation is required for this test. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.
Do not use a gel-barrier tube.
| Temperature | Period |
|---|---|
| Room temperature | 14 days |
| Refrigerated | 14 days |
| Frozen | 14 days |