Prescription opioid dose reductions and potential adverse events: a multi-site observational cohort study in diverse US health systems.

In response to the increasing opioid crisis, many medical associations, policy makers, and insurers have argued for dose reductions. However, when doses are reduced too quickly, patients may experience short- and long-term adverse events. Consistent with other studies, dose reductions higher than 30% were associated with higher odds of emergency department visits, opioid overdose, and all-cause mortality in the month following dose reduction.