backgroundThe use of controlled substances, especially opioids, is a public health concern. Canada is the country with the second greatest opioid use in the world. The use of these substances is associated with problems of misuse, as evidenced by North America's opioid crisis.

objectivesTo describe and analyze usage patterns for controlled substances in a health care facility from 2003/04 to 2017/18, and to propose a tool for monitoring the use of controlled substances in this setting.

methodIn this retrospective descriptive study, usage data for all controlled substances were extracted from the institution's supply management software for the period April 1, 2003, to March 31, 2018. The data are presented according to the

resultsDuring the last 15 years, use of controlled substances at the study facility dropped by 43% (min. 739 and max. 1292 DDD/1000 inpatient-days per year). From 2003/04 to 2017/18, the main therapeutic classes consumed (in decreasing order) were opioids, hypnotics and sedatives, anxiolytics, and general anesthetics. The main opioid molecules consumed in 2017/18 were hydromorphone and injectable morphine.

conclusionsThis retrospective descriptive study showed a decrease in the consumption of controlled substances in the study facility from 2003/04 to 2017/18. It also demonstrated the feasibility of developing a tool for monitoring the use of controlled substances in a health care facility. This approach could be implemented at a larger scale to foster comparisons between facilities.