Graves’ disease is an autoimmune disorder that results in the overproduction of thyroid hormones. It is the most common cause of hyperthyroidism. Women 20 to 40 years of age are typically affected. Thyrotoxicosis may cause unexplained weight loss due to an increased metabolic rate. Patients may present with goiter, exophthalmos, diaphoresis, tremors, heat intolerance, loose stools, and pretibial myxedema. The most common cardiac manifestation is tachycardia, often associated with palpitations. The treatment options for Graves’ disease include antithyroid drugs, radioiodine therapy, and thyroidectomy.