This past Monday, my son had a severe anaphylactic reaction to the contrast dye from a CT scan.  His rate was dangerously low, & he was rushed to the ER and treated.  They used several drugs, Epinephrine being one, and Benadryl being another.  They also used a steroid on him as well.  He stabilized but was admitted overnight for further monitoring.  He is now complaining that his back aches and he is fatigued easily.  I am trying to find out if this is a result of the episode, or if this is being caused by any of the drugs he was administered.
Hi, thank you for the query. With this presentation, it might have been possible that he developed a peptic ulcer which can give backache at times. If I were his treating doctor, I would add Chat Doctor. I hope that answers your query. If you have additional questions or follow-up queries then please do not hesitate in writing to us. We will be delighted to answer more questions from you. I wish him good health