More than half of the opioid tablets prescribed for patients who underwent orthopaedic or urologic procedures went unused in a new study by researchers at the Perelman School of Medicine at the University of Pennsylvania. Using an automated text messaging system that regularly checked in with patients on their pain and opioid use, the study also showed that most opioids are taken within the first few days following a procedure and may not be necessary to manage pain even just a week following a procedure. The study was published today in JAMA Network Open.