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.