Executive summary of a 2013 analysis from Cerner in Corportate Wellness Magazine. Abstract: Due to barriers such as cost, regimen complexity and perceived inefficacy, a substantial percentage of patients do not conform to medical instructions. On-site health centers with on-site pharmacies may improve medication adherence through convenient, holistic and relatively inexpensive care. Accordingly, this study sought to evaluate the influence of these on-site pharmacies on medication adherence. Using a retrospective analysis of electronic prescribing and claims data, medication adherence was assessed among employees and their dependents that received medications from an on-site health center’s pharmacy compared with those that used an alternative site.