There are some people who suffer from chronic overconsumption, which means that they have been consuming large amounts of caffeine daily for weeks or months.Caffeine has a half-life in the body of up to 6 hours, meaning that half of the amount consumed at 8 am could still be in your system at 2 pm. With this type of long-lasting effect, there are serious consequences when you're drinking too much coffee and tea on a regular basis. Chronic over-consumption can lead to caffeine intoxication, which is when you have more than 400 milligrams of caffeine in your body.Caffeine toxicity can cause symptoms that are similar to poisonings, such as vomiting, palpitations, and tremors. Symptoms of caffeine overdose include abdominal pain, delirium, disorientation, diarrhea, dizziness/lightheadedness, excessive urination or diuresis, hallucinations, or neuromuscular tremors. If the body has too much caffeine it could suffer from cardiac arrest.It's important to be aware that some medications also contain caffeine. Taking medication with even 50mg of caffeine could mean ingesting around 200 mg if you're sensitive to it - double the recommended daily intake! That's why it's also important to check the caffeine content of what you're taking.