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Ontario Poison Centre




Caffeine is found in a variety of food and drinks, even in medications. While caffeine is generally safe in adults (Health Canada recommends no more than 400mg daily), children are much more susceptible to the side effects of caffeine due to their smaller body size.

Poisoning Risk

Dependent on dose/amount ingested.

Expected Symptoms

  • Caffeine overuse can cause headache, nausea and difficulty sleeping.
  • Caffeine toxicity can cause irregular heart rhythms and seizures.

Home Treatment

  • Encourage good hydration.
  • Call the Poison Centre for further advice.


Every case is different. OPC is available 24hrs/day to provide information for your individual situation. Call 1-800-268-9017 (Toll-free) or 416-813-5900 (Local).



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