In addition to the large number of drugs added since the previous DrugBank version, 11 891 existing drug entries have also been thoroughly updated. This gap filling was possible due to the increase in the number of permanent curation team members, but also facilitated by our rigorous update tracking system for previously approved drugs. Input from the broader community into inaccuracies and omissions from existing entries is another key reason, as curators will routinely check all fields of an existing drug when addressing such issues.