What is the role of lab tests in the workup for depression and suicide?

Updated: Sep 02, 2020
  • Author: Louise B Andrew, MD, JD; Chief Editor: Barry E Brenner, MD, PhD, FACEP  more...
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Depression is a clinical diagnosis. Laboratory tests are primarily used to rule out other diagnoses. Consider the following laboratory tests:

  • Complete blood count (CBC)

  • Electrolytes, including calcium, phosphate, and magnesium

  • Blood urea nitrogen (BUN) and creatinine

  • Serum toxicology screen

  • Thyroid function tests

  • Vitamin B12

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