Retrospective Chart Review of Advanced Practice Pharmacist Prescribing of Controlled Substances for Pain Management at the Harry S. Truman Memorial Veterans’ Hospital
Background: The US Department of Health and Human Services’ 5-point strategy to combat the opioid overdose public health crisis includes improved pain management. There is a shortage of adequately trained health care providers in pain management. Advanced practice pharmacists may be able to help fill that void. The objective of this project was to identify the impact of an advanced practice pharmacist with controlled substance prescriptive authority on morphine milligram equivalent dose (MME) and compliance with opioid risk mitigation.
Methods: In March 2020, a single-site retrospective chart review was conducted of patients who were prescribed controlled substances from July 1, 2018 to January 31, 2020. Patients received care through the outpatient Pharmacy Pain Clinic in-person or via telephone who were enrolled at the Harry S. Truman Memorial Veterans’ Hospital in Columbia, Missouri, or associated outlying outpatient clinics. Patients were included if they were referred to the Pharmacy Pain Clinic and prescribed a Schedule II or III opioid medication. A 2-sided t test was conducted to compare MME, and a Fisher exact test was used to compare adherence to opioid risk mitigation.
Results: Patients seen in Pharmacy Pain Clinic had a statistically significant reduction in MME from consult (93 MME) to discharge (31 MME) ( P < .01). There was also a statistically significant ( P < .01) improvement in use of opioid risk mitigation strategies, including urine drug screen, informed consent, naloxone, prescription drug monitoring program checks, and stratification tool for opioid risk mitigation dashboard reviews.
Conclusions: An advanced practice pharmacist with controlled substance prescriptive authority improved patient care with demonstrated statistically significant differences in MME and adherence with opioid risk mitigation from consult to discharge. Health care teams should look to add advanced practice pharmacists to their team as medication experts to deliver comprehensive medication management, which can include controlled substance prescribing and management.
Strengths and Limitations
There were numerous strengths of the project. First, this addressed an unmet need in the literature with limited data discussing pharmacist prescribing controlled substances for pain management. There was 1 data reviewer who made the data collection process consistent. Since this retrospectively reviewed controlled substance prescribing in clinic, it captured real-world practice compared with that of experimental models. There were also several limitations in the project. The person collecting the data was also the person who conducted the clinic. The study was conducted retrospectively and based on documented information in the medical record. The population reviewed was primarily male and older, which fits the VA patient population but has less generalizability to other patient populations. This project was conducted at a single VA facility so may not be generalizable to other VA sites. It is unknown whether patients were again prescribed opioids if they left the VA for the community or another VA facility. The pain diagnoses or locations of pain were categorized to main groups and reliant on the referring provider. Another major weakness was the lack of comparison of pain scores or validated objective measure of function at baseline and at discharge. This consideration would be important for future work.
Conclusions
Pharmacists functioning as APP are key members of the pain management team. A review of a pharmacy-run pain clinic demonstrated statistically significant reduction in MME and improvement in opioid risk mitigation from consult to discharge. Patients enrolled in the pharmacy-managed clinic also had improvements in adherence to opioid risk mitigation strategies. Future attention should be focused on further expanding training and positions for pharmacists as APP in pain management.
Acknowledgments
The author thanks Chris Sedgwick for his assistance with data capture.
