Prof David Nutt is a British neuropsychopharmacologist known for his research on how drugs affect the brain, particularly in areas such as addiction, anxiety, and sleep. He is the founder and chairman of Drug Science, a non-profit organisation established in 2010 to provide independent, evidence-based information about drugs. In 2019, he co-founded GABA labs and its subsidiary SENTIA Spirits, which focus on developing and marketing alternatives to alcohol.

Until 2009, he was a professor at the University of Bristol, where he led the Psychopharmacology Unit. He later became the Edmond J Safra Chair in Neuropsychopharmacology at Imperial College London and now directs the Neuropsychopharmacology Unit within its Division of Brain Sciences. Prof Nutt has also served on the Committee on Safety of Medicines and was President of the European College of Neuropsychopharmacology.