In July 2018, the FDA approved iobenguane I 131 (Azedra), the first treatment for patients with unresectable pheochromocytoma or paraganglioma, which are rare tumors of the adrenal gland, that require systemic anticancer therapy. These tumors, which typically appear at an early age and are associated with premature death, can increase the production of epinephrines and norepinephrines, leading to a host of symptoms, including hypertension, vomiting, weakness, and chest pain.