Evaluation of physicians prescribing of COVID-19 guideline-directed outpatient treatments in a primary care walk-in clinic.

Background: Coronavirus disease 2019 (COVID-19) is a respiratory virus that has afflicted millions of individuals in the United States. A few medications have been determined to be beneficial for outpatient treatment. The medications in use against mild-to-moderate COVID-19 in the outpatient setting during the study period are nirmatrelvir-ritonavir, remdesivir, molnupiravir, and bebtelovimab. Proper assessment and treatment of patients with mild-to-moderate COVID-19 in the outpatient setting is critical to reducing rates of disease progression and hospitalization.

Objective: This study aimed to evaluate the appropriateness of the prescribing by internal medicine physicians for mild-to-moderate Coronavirus disease 2019 (COVID-19) infections based on the National Institutes of Health (NIH) guideline-directed COVID-19 outpatient treatment options.

Methods: This is a retrospective chart review examining the outpatient treatment of mild-to-moderate COVID-19 by internal medicine physicians between February 2022 and August 2022. Patients were eligible if they were 18 years or older, had a positive home or polymerase chain reaction (PCR) test, completed a telehealth visit within 7 days of the positive test, and were prescribed either nirmatrelvir-ritonavir, remdesivir, molnupiravir, or bebtelovimab for COVID-19 treatment. The primary end point was the appropriateness of COVID-19 treatment in the outpatient setting based on NIH guidelines, patient characteristics, and prescribing information for the medications. The secondary end point was hospitalization within 30 days of initiation of outpatient COVID-19 treatment. The presence or absence of a clinical pharmacist consultation at the time of prescribing was recorded as a process measure.

Results: A total of 376 encounters were assessed, of which 226 were included and analyzed. A total of 210 participants (93%) received nirmatrelvir-ritonavir. The remaining participants received molnupiravir or bebtelovimab. Overall, guideline-concordant treatment for mild-to-moderate COVID-19 was prescribed for 200 participants (88%). Among patient characteristics, only glomerular filtration rate (GFR) had a statistically significant difference between groups prescribed medication for the treatment of mild-to-moderate COVID-19. Fifty-six participants (25%) received clinical pharmacist consultation. Three participants were hospitalized for COVID-19 within 30 days of receiving an appropriately prescribed medication for treatment. Nirmatrelvir-ritonavir was the only medication potentially prescribed inappropriately due to lack of being renally dose adjusted and the extensive drug-drug interactions.

Conclusion: Nirmatrelvir-ritonavir was the most prescribed medication for the treatment of mild-to-moderate COVID-19, consistent with its position as first-line therapy and widespread accessibility. The study results will inform future educational opportunities, such as in-service presentations and handouts, that may improve the prescribing of outpatient treatment for mild-to-moderate COVID-19 moving forward.