Where did the Tylenol case occur?

The Tylenol case occurred in the Chicago metropolitan area in the early 1980s. In September 1982, seven people died after ingesting cyanide-laced Tylenol capsules, leading to a nationwide panic over product safety. The incident prompted widespread changes in packaging and labeling practices for over-the-counter medications. The case remains one of the most infamous product tampering incidents in U.S. history.