Leslie Lars Iversen FRS is a British pharmacologist, known for his work on the neurochemistry of synaptic transmitters
Iversen was Director of the MRC Neurochemical Pharmacology Unit, in Cambridge from 1971 to 1982, then Director of the Merck, Sharp & Dohme Neuroscience Research Centre from 1982 to 1995. He became Visiting Professor of Pharmacology, at the University of Oxford in 1995.
He was elected a Fellow of the Royal Society in 1980, and gave the Society's Ferrier Lecture in 1988.