Ontario Warning Over Dangerous Benadryl Misuse Among Youth

Nipissing First Nation in Ontario has issued a health warning after identifying a concerning trend among some youth and young adults who are intentionally overdosing on Benadryl, a common allergy medicine containing diphenhydramine. The warning said some young people may think the effects feel exciting or different, but high doses do not produce safe or positive effects and carry serious health risks.

The alert comes amid renewed concern about the misuse of over-the-counter allergy medications, especially through online trends or social media challenges. The U.S. Food and Drug Administration has previously warned that taking higher than recommended doses of diphenhydramine can lead to serious heart problems, seizures, coma, or death.

The risk is that many families see Benadryl as an ordinary medicine because it is available without a prescription. But over-the-counter does not mean risk-free. Diphenhydramine can also be found in some allergy, cold, cough, and sleep-aid products, increasing the chance of accidental or intentional overdose if multiple products are used.

Ontario medication safety resources warn that over-the-counter products may come in different strengths and may contain more than one active ingredient. Parents and caregivers are advised to ask a pharmacist or doctor about the correct dose, especially for children, rather than guessing or relying on someone else’s experience.

The danger is not limited to young children. Teenagers may misuse the drug intentionally after seeing online content or hearing about high-dose experiences. High doses can cause hallucinations, severe confusion or agitation, abnormal heart rhythm, seizures, breathing problems, loss of consciousness, or collapse. If someone has taken too much diphenhydramine and is hallucinating, cannot be awakened, has a seizure, has trouble breathing, or collapses, urgent medical help is needed.

The FDA recommends that families store diphenhydramine and all other prescription and non-prescription medicines up and away, out of children’s reach and sight, and preferably locked to prevent accidental poisonings and teen misuse. It also advises reading the drug label carefully to check whether a product contains diphenhydramine and how it should be used.

In Ontario, the Ontario Poison Centre says it is available by phone 24 hours a day, every day of the year, for poison emergencies and questions about poisoning. The centre can be reached at 1-844-764-7669. If a person is unconscious, having trouble breathing, or in immediate medical danger, call 911.

The service message for families is clear: do not leave allergy, sleep, or cold medications within easy reach of children or teens, and do not assume a medication is harmless because it is sold without a prescription. Parents should watch for conversations about online “challenges” and speak calmly with teens about the fact that a high dose of a common medicine can become life-threatening.

The warning is not meant to create panic. It is a reminder that prevention begins at home: locked medicines, correct dosing, careful label reading, and asking a pharmacist or doctor when in doubt.

Health Note
This article is for awareness only and does not replace medical advice. If an overdose is suspected or serious symptoms appear, call emergency services or a poison centre immediately.