The question bank is the fastest way to start, but PMHNP Helper also includes board-review planning, student resources, and plain-English guidance for psychiatric nurse practitioner students who are still learning the exam landscape.
A 34-year-old female presents to the psychiatric clinic with a 2-month history of severe anxiety, racing thoughts, decreased need for sleep (sleeping only 3-4 hours yet feeling energized), pressured speech, and increased goal-directed activity. She has reorganized her entire house, started three new projects at work, and has been unusually talkative and confident. She has no prior psychiatric history. On examination, she is thin with a resting heart rate of 112 bpm and a fine tremor of outstretched hands. Her eyes appear prominent with mild proptosis and lid lag on downward gaze. She has a diffusely enlarged, nontender thyroid gland. Her skin is warm and moist, and she reports heat intolerance, unintentional weight loss of 12 pounds, and increased frequency of bowel movements. Deep tendon reflexes are brisk with shortened relaxation phase. Which diagnostic test is most critical to obtain before initiating psychiatric treatment?
Explanation
Hyperthyroidism, particularly from Graves' disease, can closely mimic bipolar mania with decreased need for sleep, pressured speech, racing thoughts, and increased goal-directed activity. The PMHNP must identify the physical signs that distinguish hyperthyroidism from primary psychiatric disorders, including tachycardia, goiter, exophthalmos, lid lag, heat intolerance, weight loss, and hyperactive reflexes with shortened relaxation phase.
Key Takeaway
New-onset manic symptoms with tachycardia, goiter, exophthalmos, lid lag, weight loss, and hypermetabolic features should prompt immediate thyroid function testing before initiating psychiatric treatment, as hyperthyroidism is a treatable medical mimic of bipolar mania.