1. While you're probably familiar with the signs and symptoms of alcohol intoxication, alcohol isn't the only drink that can cause an adverse reaction when consumed in significant quantity. Drinking too many cups of coffee or tea over a short period of time can result in symptoms of caffeine intoxication, a syndrome that's not only unpleasant, but can potentially lead to death.
2. The amount of caffeine required to give symptoms of caffeine intoxication is surprisingly low. As little as three cups of coffee drank in a short period of time can give rise to thenervousness, flushing, and anxiety, characteristic of caffeine intoxication. While these symptoms are uncomfortable, they're generally not life threatening unless there are underlying medical problems such as poorly controlled hypertension or heart disease. If heart disease is present, lower doses of caffeine can result in abnormal heart rhythms.