NCCID has assembled a glossary of terms related to regulatory processes for ensuring the safety and efficacy of drug therapies, including new drugs and new therapeutic applications for existing drugs. The aim is to increase understanding of these terms and transparency on related policies that protect Canadians. Public health leaders may find this glossary useful to support communication with the general public and other stakeholders, particularly in the pandemic context where concerns arise for expedited research and regulatory processes applied in identifying potential treatments for Covid-19. The glossary may be expanded and represents a starting point for further conversations focused on proven and investigational drug therapies, with consideration of public health ethics and equity.