Management of Normal TSH with Hypothyroid Symptoms

Initial Diagnostic Approach

• The American College of Endocrinology suggests that when TSH and free T4 are both normal, systematically evaluate for adrenal insufficiency by checking morning ACTH and cortisol levels, as fatigue and cold intolerance overlap significantly with hypothyroid symptoms 1
• The American Heart Association recommends that unexplained fatigue warrants evaluation for sleep apnea or other sleep disturbances, and review of all medications, including NSAIDs, beta-blockers, and neuropsychiatric agents that can cause similar symptoms 2

Consider Alternative Diagnoses

• The Endocrine Society indicates that if free T4 is low with normal or low TSH, this suggests central hypothyroidism from pituitary or hypothalamic dysfunction, which requires different management including evaluation of other pituitary hormones, particularly the hypothalamic-pituitary-adrenal axis 1
• The American Psychiatric Association notes that fatigue, weight changes, and constipation are cardinal features of major depressive disorder, and should be considered as an alternative diagnosis when TSH and free T4 are normal 1