Evaluation of a pharmacist-led naloxone coprescribing program in primary care

To determine the impact of a pharmacist-led coprescribing initiative on patient access to naloxone in a primary care setting.

Family medicine residency practice with embedded pharmacists in western North Carolina.

In June 2016, clinical pharmacists embedded in a primary care clinic initiated a naloxone coprescribing initiative with the aim of increasing access to naloxone for patients on chronic opioid therapy who were on 50 mg or greater morphine-equivalents daily (MED), on a concomitant benzodiazepine, had a history of an overdose, or had a diagnosis of a substance use disorder. Pharmacists' roles included educating providers and clinical staff regarding naloxone, creating quick links within the electronic health record to more easily prescribe naloxone, identifying patients who met criteria for naloxone, and counseling patients about naloxone.

This study was a single-cohort pre- and postintervention study. One year after initiation of the program, data were manually collected to assess the rates of naloxone prescribing and the reason for requiring naloxone. In addition, pharmacy students called pharmacies to determine fill rates and obtain reasons given by patients for not filling naloxone.

A total of 234 patients remained candidates for naloxone at the end of 1 year. Naloxone coprescribing increased from 3.4% at baseline to 37.2% at follow-up (P = 0.0001). Seventy-one percent of patients required naloxone because of chronic opioid therapy doses of 50 mg or more MED, 55% were on a benzodiazepine, 6% had a diagnosis of a substance use disorder, and 1% had a history of overdose. Of the patients who received a naloxone prescription, 31.4% filled it.

Embedded clinical pharmacists in primary care have the potential to increase naloxone coprescribing for high-risk patients treated with chronic opioid therapy for pain.