The foil seal on your medicine exists because of seven murders nobody was ever convicted of

Peel back the foil under a bottle cap, break the plastic band around the lid, tear open a sealed box. You do it without thinking. Before 1982, almost none of it was there.

The poisonings

In late September 1982, people in the Chicago area started dying suddenly after taking Extra-Strength Tylenol. A 12-year-old girl. A young man, then his brother and sister-in-law, who took pills from the same bottle while grieving him. Within days, seven people were dead.

The capsules had been laced with potassium cyanide. Investigators concluded that someone had taken bottles off store shelves, poisoned some of the capsules, and put the bottles back for anyone to buy. The bottles had come from different factories, so this wasn't a manufacturing problem. It was someone walking into stores.

The recall

Johnson & Johnson pulled Tylenol from shelves nationwide — about 31 million bottles, worth more than $100 million. At the time, it was an almost unheard-of move for a company to make on its own, and it's still taught in business schools as the textbook crisis response.

What changed, fast

• November 1982: the FDA issued an emergency rule requiring tamper-resistant packaging for over-the-counter drugs.
• The same month, Tylenol came back in a new triple-sealed package: a glued box, a plastic neck band, and a foil seal over the bottle mouth.
• 1983: Congress passed the Federal Anti-Tampering Act, making product tampering a federal crime, punishable by up to life in prison if someone dies.
• Drugmakers moved away from easy-to-open powder capsules toward solid "caplets."

Nobody was convicted

A man named James Lewis sent Johnson & Johnson a letter demanding $1 million to "stop the killing." He was convicted of extortion and went to prison, but he was never charged with the murders, maintained he had nothing to do with them, and died in 2023. DNA testing never matched him to the bottles.

More than forty years later, the Tylenol murders are still unsolved.

What this means for you

Those seals are only useful if you actually look at them.

• Check the seal before the first dose. If the foil is torn, the neck band is broken, or the box looks reglued, don't take it.
• Return it to the store or pharmacy and tell them why, and report it to the FDA through MedWatch (fda.gov/medwatch).
• Look at the pills. If they don't match what you normally get — color, shape, smell, markings — ask the pharmacist before taking them.

And while you're in the medicine aisle: generic versions are the same drug for a lot less.

Quick reference

• 1982: seven people in the Chicago area died from cyanide-laced Tylenol capsules
• Johnson & Johnson recalled about 31 million bottles
• The FDA required tamper-resistant packaging within weeks; tampering became a federal crime in 1983
• No one has ever been convicted of the murders
• Never use a medicine with a broken or missing seal — return it and report it