Myxedema coma, a rare and
life-threatening condition, results from a progression of hypothyroidism.
Common precipitating factors are infection, medication, and environmental stress.
Graves disease causes hyperthyroidism. Propylthiouracil is used to treat
hyperthyroidism. Uncontrolled diabetes can cause a coma, but a myxedema coma
specifically refers to one occurring from advanced hypothyroidism.