Trajectories of pro re nata (PRN) medication prescribing and administration in long-term care facilities.

Background: Little is known about changes in pro re nata (PRN) medication prescribing and administration in residential aged care facilities (RACFs) over time.

Objective: To determine the prevalence and factors associated with PRN medication administration in RACFs and examine changes over 12-months.

Methods: Secondary analyses utilizing data from the SIMPLER randomized controlled trial (n = 242 residents, 8 RACFs) was undertaken.