Study Links Weight Loss Drugs to Weaker Ties Between Impulsivity and Violence

A study found current users of GLP-1 weight loss drugs had substantially weaker associations between impulsivity and self-reported violent behavior than former users.

Researchers analyzed data from a 2025 survey of 7,521 U.S. adults, including 821 who had ever used GLP-1 medications such as semaglutide. The study compared current users with former users on measures of impulsivity, alcohol use, and violent behavior including fighting, assault, and robbery.

The correlation between impulsivity and violent behavior was about 62 per cent weaker among current users. The relationship between alcohol use and violent behavior was about 52 per cent weaker among current users.

The lead author said the link between impulsivity and violent behavior was substantially weaker among current GLP-1 users compared to former users. A coauthor said the findings suggest the drugs may act like cognitive behavioral therapy by weakening the path from impulse to action.

GLP-1 drugs mimic a natural hormone that regulates blood sugar, appetite, and digestion. They also affect the brain's reward centers and have been shown to reduce surges of dopamine linked to addictive behaviors. Researchers noted the study was observational and said more research is needed to determine whether the drugs reduce violence risk and to identify the mechanisms involved.