The researchers found that PMP search rates were increased by 4.5 and 4.0 percent with letters highlighting the mandate alone or letters highlighting the mandate and coprescribing information, respectively, but no significant impact was seen on coprescribing. An increase in PMP account-holding rates was also seen in association with these letters. These effects lasted for eight months or longer. No effect on key outcomes was seen for the letter with only coprescribing information.
https://www.kxly.com/i/letter-intervention-ups-prescription-monitoring-program-engagement/