Abstract
Hypokalemic periodic paralysis with thyrotoxicosis has never been described in pregnancy or the puerperium. A 31-year-old Hispanic woman underwent three prostaglandin inductions for a second-trimester missed abortion. Her management was complicated by hyperthermia, nausea, vomiting, and diarrhea. She developed isolated proximal muscle paralysis and sensory loss on the first post-abortion day. Her serum potassium was 1.5 mEq/L. The serum free thyroxine index exceeded 25 and TSH was below 0.03 microIU/mL, leading to a diagnosis of thyrotoxic hypokalemic periodic paralysis. Oral and parenteral potassium repletion restored full neurologic function, and propylthiouracil treatment was initiated until thyroid ablation could be performed. Gastrointestinal potassium loss during prostaglandin-induced abortion may unmask previously undiagnosed periodic paralysis.
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