Error in Introduction

In the Original Investigation titled “Effectiveness of Injectable Extended-Release Naltrexone vs Daily Buprenorphine-Naloxone for Opioid Dependence: A Randomized Clinical Noninferiority Trial,”¹ published online October 18, 2017, and in the December print issue of JAMA Psychiatry, there was an error in the first sentence of the third paragraph of the Introduction. The sentence beginning “The opioid agonist naltrexone” should have read “The opioid antagonist naltrexone….” This article was corrected online.