Heart Rate

• A high intake of caffeine will cause a rapid or irregular heartbeat. An irregular heart beat can cause death and should be treated in an emergency room immediately.
  
  

Breathing

• Babies with caffeine poisoning will take rapid, deep breaths. Older children may experience discomfort breathing, difficulty drawing breath and wheezing.
  
  

Feeling Sick

• Nausea, vomiting, fever, diarrhea and a stomachache are all symptoms of caffeine poisoning in children.
  
  

Excitement

• Excitement and restlessness are indicators of caffeine toxicity.
  
  

Tenseness

• Muscles may alternate between being very tense and very relaxed. Involuntary tremors, convulsions, seizures and muscle twitching may also occur.
  
  

Delirium

• Mild delirium, including insomnia, hallucinations, and other neurological symptoms, may accompany caffeine poisoning. Confusion and dizziness are common.