An adverse reaction to a high consumption of aminophylline or theophylline which may also be present in some asthma medications. Symptoms include restlessness, lethargy, nausea, diarrhea, vomiting, abdominal pain, gastrointestinal bleeding, headache, tinnitus, thirst, delirium, seizures, tachycardia, cardiac arrhythmias and changes in blood pressure.