Anecdotes are powerful tools that humans use to make decisions. Despite their power and influence, they are sometimes misused, and sometimes undervalued. Ignoring or under-estimating the role of anecdotal information in health care decisions is likely to hinder communication among decision makers, and to retard their uptake of research evidence. Anecdotal information should not be considered as a replacement for, but as a complement to formal research evidence. If evidence-based health care is to meet its potential, the important role of anecdotes must be acknowledged, studied and utilized.