Doxepin

Sinequan

9 days

Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

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Measures doxepin, a tricyclic antidepressant. Used in therapeutic and toxicity evaluation.

Serum or Plasma

1 mL

Red-top tube, lavender-top (EDTA) tube, or green-top (heparin) tube. Do not use a gel-barrier 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.

This test does not require any special collection or pre-analytical handling. Follow routine specimen collection protocols.