Caffeine affects people differently. This page gives general information from FDA and is not medical advice or a conclusion about a product, health condition, or legal claim.

Check the product and the amount

The FDA’s caffeine information page explains that caffeine is added to many foods and beverages and that people may react differently based on factors such as sensitivity, medications, and health conditions. The label, serving size, and all sources of caffeine consumed can matter.

Health questions need medical guidance

For severe or concerning symptoms, seek emergency care. For other concerns about caffeine, an energy drink, a medication, or an underlying condition, speak with an appropriate health professional or pharmacist. Do not treat a general web page as a diagnosis or a substitute for individualized care.

Keep accurate information

  • The product name, package, label, serving size, lot information, and purchase details
  • The date, amount consumed, other relevant products, and any instructions from a health professional
  • Medical records and communications kept in their original form
  • A clear distinction between an observed event and a conclusion about cause

Source