Stephan Krähenbühl, born on November 29, 1953, studied pharmacy and medicine at the University of Berne, Switzerland. He received a formation in internal medicine, hepatology, and clinical pharmacology. He spent more than 2 years researching at the Case Western Reserve University (USA), where he was taught mitochondrial research and clinical pharmacology. He was head of the Department of Clinical Pharmacology and Toxicology at the University Hospital of Basel, Switzerland from 2000 to 2020 when he retired. His research interests include the mechanisms of drug toxicity, drug metabolism, drug–drug interactions, and dose adjustment in liver disease. He has headed the Medical Experts Committee of Swissmedic, the Swiss drug authority, since 2002.