Hi - I had oral surgery done on July 25th and have been taking lots of medications, mouth rinses and even Benedryl in case I were to develop hives from taking the Pain Killer Hydrocodone that they prescribed for me even though I am allergic to Codeine. All of a sudden I developed a rash on the torso of my body that doesn t even itch but it s all over the front of me and not the back of me. Is this due to a particular medication perhaps? Please advise and thank you for your time.