The Pennsylvania Project: pharmacist intervention improved medication adherence and reduced health care costs.

Improving medication adherence across the health care system is an ingredient that is vital to improving patient outcomes and reducing downstream health care costs. The Pennsylvania Project, a large-scale community pharmacy demonstration study, evaluated the impact of a pharmacy-based intervention on adherence to five chronic medication classes. To implement the study, 283 pharmacists from a national community pharmacy chain were assigned to the intervention group.