Pharmacist-Assisted Varenicline Tobacco Cessation Treatment for Veterans.

Abstract

Pharmacists are uniquely positioned to provide tobacco cessation interventions given their medication expertise and accessibility to the public. The purpose of this study was to evaluate the efficacy and safety of management of varenicline by clinical pharmacy specialists (CPSs) compared with other clinicians. This retrospective chart review included patients with a varenicline prescription between July 1, 2019, and July 31, 2020. Primary outcomes were reduction in tobacco use at 12 weeks from baseline, continuous abstinence at 12 weeks, adherence to varenicline therapy, and time to first follow-up. For safety evaluation, charts were reviewed for documented adverse drug reactions. Management by CPS compared with other clinicians was associated with similar mean (SD) reductions of tobacco use (-7.9 [10.4] vs -5.4 [9.8] cigarettes per day, respectively; P = .15) and rates of complete abstinence (34% vs 38%, respectively; P = .73) and higher adherence (42% vs 31%, respectively; P = .01). Mean (SD) time to first follow-up was shorter for patients in the CPS group: 52 (66) vs 163 (110) days; P < .001. Adverse events were more common in the CPS group compared with the other clinicians group (42% vs 23%; P = .02). These results suggest that CPS management of varenicline is as safe and effective as management by other clinicians. Additional research is needed to fully characterize the impact of pharmacist management of varenicline, justify expansion of CPS scope of practice, and ultimately enhance patient outcomes regarding tobacco cessation.