"caffeine overdose can kill"

My son is presently sitting in A & E waiting to be seen suffering from an increased heart rate, nausea, palpitations, shaking, feeling like he is going to die, in his own words, and just keeps on getting told, You have to wait about another 2 hours when he has already been there an hour. Caffeine can kill. are they bothered...apparantly not. according to the websites patients should be seen immediately when suffering from these symptoms. Maybe the hospital should read there own webpage recommendations. Totally disgusted and worried.