This is a serious question. On two separate days, I drank a Red Bull energy drink and after about 4 hours later, I had severe symptoms. The first time, I became shaky with a fever and vomited a little. The second time, I had became very weak and shaky, with a hard heartbeat. I had to leave work because I almost passed out. I'm afraid of calling the doctor because he may just pass it off as a joke. Also, I'm wondering if it was just the heat or a kidney/urinary infection I've been having.