Given the importance of health literacy to the proper use of medications, and the apparent lack of progress in improving medication adherence, the Roundtable on Health Literacy formed an ad hoc committee to plan and conduct a 1-day public workshop that featured invited presentations and discussion of the role and challenges regarding clarity of communication on medication. Participants focused on using health literacy principles to address clarity of materials, decision aids, and other supportive tools and technologies regarding risks, benefits, alternatives, and health plan coverage. This publication summarizes the presentations and discussions from the workshop.