To determine if the administration of standardized opioid disposal instructions with focused parental education improves proper disposal of leftover opioid medication among families of children undergoing ambulatory urologic surgery compared to routine postoperative instructions.

A prospective, double-blinded, single-center randomized controlled trial was conducted in children 6-18 years undergoing ambulatory urology procedures between October 2021 and April 2023. Patients were randomized (1:1) to receive either the Food and Drug Administration (FDA) opioid disposal best practices worksheet plus nursing parental education or routine postoperative instructions alone. All patients were prescribed acetaminophen and ibuprofen and a per-protocol rescue opioid prescription. The primary outcome was rate of proper opioid disposal at 10-14 days post-procedure. Secondary outcomes included parents' postoperative pain measure (PPPM) scores, numerical pain scale (NPS) scores, and weight-based opioid utilization at 48 hours and 10-14 days.

We randomized 104 participants (53 intervention, 51 control) with 97% (101/104) complete follow-up data at 10-14 days. Patient demographics, procedural characteristics, and analgesia use were similar between groups. We observed no significant difference in proper opioid disposal rates between arms (31% intervention vs 18% control; estimated difference in proportion 13% [95% CI, −4%-29%]; P = .1). There were no increased odds of proper disposal of leftover opioid medication at 10-14 days with the intervention compared to the control (OR 2.0 [95% CI 0.8-5.1]; P = .1). We observed no differences in PPPM scores, NPS scores, or opioid utilization at 48 hours or 10-14 days.

Providing formal opioid disposal instructions with parental education did not improve proper disposal of leftover opioid medication nor did it alter post-discharge opioid utilization after pediatric urologic surgery.