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Teen Has 'Zero Brain Activity' After Viral TikTok Challenge

Doctors said the overdose can cause seizures and cardiac arrest, and the family plans to donate her organs.

  • On Tuesday, 15-year-old Leah Presson was declared brain dead after allegedly attempting the Benadryl Challenge, a viral trend involving excessive allergy medication consumption that triggered seizures and cardiac arrest.
  • The Benadryl Challenge encourages participants to ingest excessive medication to trigger hallucinations, a dose doctors warn can also cause seizures, cardiac arrest, and respiratory failure.
  • Leah's father, Richard Presson, said he is "still waiting on a miracle even though some have given up," while the family plans to donate her organs, potentially saving up to 90 lives.
  • Hospital staff have a 72-hour window before organ harvest. Dr. Ryan Brown warned parents to monitor children for warning signs, saying, "If your child is acting strange, look around."
  • While the Benadryl Challenge first emerged in 2020, renewed popularity in recent weeks has sparked concern; Richard Presson urged families to educate children, stating, "But these challenges are just silly, and they need to be educated.
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The young woman's family said she would have participated in an alleged social media challenge related to the excessive consumption of an antihistamine.

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NewsNation broke the news in Chicago, United States on Tuesday, June 16, 2026.
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