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Kenneth E. Leonard

Director of the Clinical and Research Institute on Addictions

Jacobs School of Medicine and Biomedical Sciences 


Alcohol, substance abuse and aggression; effects of substance use on marriage, families and relationships; interpersonal (domestic) violence; medical and recreational marijuana; prescription painkillers

Head shot of Kenneth E. Leonard.

Kenneth Leonard is an expert on issues pertaining to substance use and abuse. He has more than 30 years of experience as a researcher in this field, with his work focusing on the effects of substance use and abuse on marriage, families and interpersonal relationships.

His research — funded by the National Institutes of Health, National Institute on Alcohol Abuse and Alcoholism and National Institute on Drug Abuse — has examined topics that range from bar violence to the effect of alcohol on marital aggression, parenting and infant development.

In addition to providing media with insight on substance use and families, Leonard can comment on a range of topics such as the growing crisis of opiate and heroin overdoses, and the debate over whether marijuana should be legalized for medical and/or recreational use.

He is a fellow and former president of the American Psychological Association’s Division 50 (Addictions).


Kenneth E. Leonard, PhD
Director and Senior Research Scientist, University at Buffalo Clinical and Research Institute on Addictions
Research Professor of Psychiatry, Jacobs School of Medicine and Biomedical Sciences at the University at Buffalo