helicobacter pylori infection
"I started the pack this evening.  Within half an hour of taking the 4 pills, followed by a complete healthy dinner, my throat tightened up.  Couple minutes later I started to glow and had a warm sensation all over.  This turned to an aggressive itch and after about another 5 or so minutes I had trouble breathing.  The skin sensation turned into an unbearable burning sensation all over.  I ended up on the floor and my wife called 911.    Paramedics came, blood pressure and pulse went OTT.  Paramedics thought it was a allergic reaction, gave me benedril to counter the effect and about 15 minutes later my throat started to relax, the glow and red skin started to subside and he itching and tingling started to calm down.  Better luck next time."