On September 29, 1982, the first victims of the Chicago-area Tylenol poisonings died after taking capsules that had been laced with cyanide.
Seven people ultimately died. Investigators never secured a murder conviction, but the consequences for consumer products were lasting.
The case accelerated tamper-evident packaging and changed expectations for over-the-counter medicine safety. The seals, bands and protected bottle openings that now feel ordinary are part of that legacy.
