International Anesthesia Research Society is an international society committed to improving clinical care, education, and research in anesthesia, pain management and perioperative medicine.

The IARS is anesthesiology's non-political organization focused on providing scientific and evidence-based safe anesthesia care.  Founded in 1922, the IARS contributes more than $1 million annually to fund anesthesia research and provides a forum for leaders in anesthesia research to share information and ideas.  The Society publishes the Anesthesia & Analgesia Journal and sponsors the SmartTots initiative in partnership with the FDA.  Membership includes physicians and others engaged in anesthesia-related practice, research, and training worldwide.