Pharmacists play a critical role in medication safety during transitions of care. This multi-center study found that a transitional pharmacy care program (including teach-back, pharmacy discharge letter, home visit by community pharmacist, and medication reconciliation by both the community and hospital pharmacist) did not decrease the proportion of patients with adverse drug events (ADE) after hospital discharge. The authors discuss several possible explanations as to why the intervention did not impact ADEs and suggest that a process evaluation is needed to explore ways in which a transitional pharmacy care program could reduce ADEs.