Effects of PDMPs
"Although several studies found implementation of prescription monitoring programs for Schedule II opioids associated with a decrease in prescription rates for Schedule II opioids and a shift towards increased rates of Schedule III, non-monitored opioid prescribing, the studies were not designed to determine whether the changes were due to a decrease in inappropriate or unnecessary Schedule II opioid use, or if these changes resulted in subsequent undertreatment of pain.317, 318 No study has evaluated patient outcomes such as pain relief, functional status, ability to work, and abuse/addiction associated with implementation of a prescription monitoring program, formulary restriction, or other policies related to opioids prescribing. Claims of positive effects of prescription monitoring programs on reducing diversion are primarily based on anecdotal reports of impressions of efficacy from policymakers and law enforcement officials.316"
"Use of Chronic Opioid Therapy in Chronic Noncancer Pain: Evidence Review," The American Pain Society in Conjunction with The American Academy of Pain Medicine (Glenview, IL: American Pain Society, February 2009), pp. 98-99.