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

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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Any views expressed above are the author's own and do not necessarily reflect the views of WebMD or Medscape.

Cite this: Stephen Soreff. Fast Five Quiz: Are You Prepared to Confront Seasonal Affective Disorder? - Medscape - Nov 23, 2016.