Fast Five Quiz: Are You Prepared to Confront Seasonal Affective Disorder?

Stephen Soreff, MD

Disclosures

November 23, 2016

No diagnostic laboratory tests are available, but focused laboratory studies may be useful to exclude potential medical illnesses. These laboratory studies include the following:

  • Complete blood cell (CBC) count

  • Thyroid-stimulating hormone

  • Vitamin B12

  • Rapid plasma reagin (RPR)

  • HIV test

  • Electrolytes, including calcium, phosphate, and magnesium levels

  • Blood urea nitrogen (BUN) and creatinine

  • Liver function tests (LFTs)

  • Blood alcohol level

  • Blood and urine toxicology screen

  • Arterial blood gas (ABG)

  • Dexamethasone suppression test (Cushing disease, but also positive in depression)

  • Cosyntropin (ACTH) stimulation test (Addison disease)

For more on the workup of depression, read here.

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