<qa>  What is the goal of this research?The goal of this research is to investigate the impact of changing opioid analgesic prescribing defaults on the quantity of opioids prescribed for acute non-cancer pain in adult primary care and emergency department settings. We will change prescribing defaults for select short-acting opioid analgesics including immediate release oxycodone and hydrocodone as well as codeine and tramadol, including their co-formulations with acetaminophen. In a cluster-randomized trial of matched pairs of Montefiore Medical Center clinical sites, stratified by specialty and teaching status, we will evaluate the impact of this intervention on patient-level outcomes using 18 months of data 6 months pre-intervention and 12 months post-intervention. 