RT Book, Section A1 Fitzgerald, Paul A. A2 Papadakis, Maxine A. A2 McPhee, Stephen J. A2 Rabow, Michael W. A2 McQuaid, Kenneth R. SR Print(0) ID 1184696753 T1 Anterior Hypopituitarism T2 Current Medical Diagnosis & Treatment 2022 YR 2022 FD 2022 PB McGraw-Hill Education PP New York, NY SN 9781264269389 LK accessmedicine.mhmedical.com/content.aspx?aid=1184696753 RD 2024/04/25 AB Key Clinical Updates in Anterior HypopituitarismOpioid use disorder has become a common cause of functional hypopituitarism.About 63% of long-term opioid (including methadone) users develop partial hypogonadotropic hypogonadism.Opioid use also causes secondary adrenal insufficiency in about 15% of patients but is less likely to cause growth hormone or thyroid deficiency.