Lithium-Induced Hyperparathyroidism: An Ill-defined Territory

Lithium is the gold standard treatment for bipolar disorder. Studies have shown an association between lithium and hyperparathyroidism. However, there is limited data regarding the management of lithium-induced hyperparathyroidism. We present a clinical conundrum which physicians frequently encounter-an excellent lithium responder refractory to other treatments who developed lithium-induced hyperparathyroidism. Medical treatment with cinacalcet was successful in management of hyperparathyroidism without discontinuing lithium maintenance therapy.