Telepharmacy and medication adherence in urban areas.

BACKGROUND

Telepharmacies, which dispense medications on-site under the supervision of an off-site pharmacist using telecommunication technologies, have been proposed as a means to ameliorate the impact of pharmacy closures and improve access to medications.

OBJECTIVES

To examine whether adherence varies among individuals filling prescription medications through a telepharmacy versus a traditional pharmacy in an urban neighborhood.

METHODS

We conducted a retrospective cohort study using dispensing records of a traditional pharmacy and a telepharmacy, located in the same low-income Chicago neighborhood, from January 2016 to December 2018. We focused on individuals using statins (n = 1044), angiotensin-converting enzyme inhibitors (ACEs)/angiotensin II receptor blockers (ARBs) (n = 1003), or noninsulin diabetes medications (NIDMs) (n = 692). We defined adherence as a proportion of days covered greater than 80% over 12-months. We examined the association between telepharmacy use and medication adherence using logistic regressions adjusted for demographics (age and sex) and index prescription characteristics (method of payment, e-prescription, 90-day supply).

RESULTS

Telepharmacy users were less adherent to statins (37.6% vs. 54.3%, adjusted odds ratio 0.54 [95% CI 0.38-0.76], P < 0.01) and ACEs/ARBs (41.4% vs, 56.5%, 0.61 [0.44-0.84], P < 0.01) than users of the traditional pharmacy. However, adherence to NIDMs was similar among users of the tele- and traditional pharmacies (65.5% vs. 60.1%, 1.47 [0.92-2.35], P = 0.11). Our findings were similar when we conducted a series of sensitivity analyses, including restricting our cohorts to those who only used their index pharmacy and analyzing cohorts of new rather than continuing users of these medications.

CONCLUSION

In this analysis, medication adherence was lower among users of telepharmacy than users of a traditional pharmacy in some but not all drug classes examined. Further research is needed to identify whether other interventions to improve adherence, such as longer hours of operation, at-home delivery, or 90-day supply, may be coupled with telepharmacies to increase their use in urban areas.