Are There Many Reactions To This Drug? I Was In

are there many reactions to this drug? I was in the ER last night for being unable to move my left leg or put any weight on it. Cause? inflammation and calcification of the pelvic area. I was xrayed and had a CAT scan showing no fracture. I am allergic to a drug that a neurologist gave me sometime ago and I can't remember what the name was. I have some itching but am taking prednisone, so I think it will ease up. Kind of a dumb question. Guess I should call the neurologist's office for that information.
Thank you!