By: History.com Editors

1982

Cyanide-laced Tylenol kills first three of seven victims

This Day In History: Cyanide-laced Tylenol kills six

Bettmann Archive/Getty Images

Published: November 13, 2009

Last Updated: January 25, 2025

On September 29, 1982, three Chicago area residents become ill and die after ingesting Extra-Strength Tylenol later found to be poisoned with cyanide. They are the first of seven victims to lose their lives after taking the over-the-counter pain reliever, which had been tampered with. The case would create a national panic over the safety of nonprescription medications and lead to new standards for pill packaging.

Seventh grader Mary Ann Kellerman was the first to die after taking the medicine overnight to combat a sore throat. After the next victim, Adam Janus, didn't wake up from a nap, he ended up in the emergency room in critical condition, and later died. After visiting his older brother in the hospital, Stanley Janus went back to Adam’s house with his wife, Theresa. To alleviate their stress-induced headaches, they both took capsules from the open Tylenol bottle that was sitting on the counter. They too were poisoned—Stanley died that day, and Theresa the next, after lapsing into a coma.

Other victims included Mary Reiner, who had a headache after giving birth, 31-year-old Mary McFarland and flight attendant Paula Prince. After Prince’s death, Richard Keyworth and Philip Cappitelli, firefighters in the Windy City, realized that all seven victims had ingested Extra-Strength Tylenol prior to becoming ill. Further investigation revealed that several bottles of the Tylenol capsules had been poisoned with cyanide.

While bottles of Extra-Strength Tylenol were recalled nationwide, the only contaminated capsules were found in the Chicago area. A possible culprit was identified when investigators discovered letters demanding $1 million to stop the killings, but a lack of evidence prevented a conviction. The mass murder did, however, lead to new tamper-proof medicine containers. It also led to a string of copycat crimes, as others sought to blackmail companies with alleged poisoning schemes, most of which proved to be false alarms.

What Is VX Nerve Agent?

Learn the sinister history behind the lethal chemical agent that killed the half-brother of an infamous dictator.

Timeline

Also on This Day in History

Discover more of the major events, famous births, notable deaths and everything else history-making that happened on September 29th

About the author

HISTORY.com works with a wide range of writers and editors to create accurate and informative content. All articles are regularly reviewed and updated by the HISTORY.com team. Articles with the “HISTORY.com Editors” byline have been written or edited by the HISTORY.com editors, including Amanda Onion, Missy Sullivan, Matt Mullen and Christian Zapata.

Fact Check

We strive for accuracy and fairness. But if you see something that doesn't look right, click here to contact us! HISTORY reviews and updates its content regularly to ensure it is complete and accurate.

Citation Information

Article title
Cyanide-laced Tylenol kills first three of seven victims
Website Name
History
Date Accessed
March 22, 2025
Publisher
A&E Television Networks
Last Updated
January 25, 2025
Original Published Date
November 13, 2009

History Every Day

Sign Up for "This Day in History"

Uncover fascinating moments from the past every day! Learn something new with key events in history, from the American Revolution to pop culture, crime and more.

By submitting your information, you agree to receive emails from HISTORY and A+E Global Media. You can opt out at any time. You must be 16 years or older and a resident of the United States.