text: Back in 2008 I had a severe reaction to a new medication that left me barely responsive. A very rare side effect of this drug was an almost mental psychosis off rapid onset that left me barely responsive. . The doctors in the ER did not believe me. They thought I was a drug addict, substance abuser since I had the symptoms of one. Totally for decades no such abuses and I do not drink or take drugs at all. However, I was lucky, a sharp intern looked up the drug ( it was amoxicillin, an antibiotic) and he told me on internet he found a site that had almost 1800 patients on it who reported the same strange side effect with amoxicillin that I was having). The intern gave me valium to relax me and told me to go to sleep and in 24 hrs that side effect would wear it self off and do not take that drug eve again. It is a matter off luck unfortunately too often you go to the ER with strange symptoms and get actual medical help.