My daughter is taking gentamicin sulfate for an eye infection and now she has a migrating rash. I know I'm allergic to sulpha drugs and I get a rash when I take them. The rash she has is red patches with white bumps within the red areas. Is this something I need to worry about? She doesn't have a fever and the best I can do right now is leave a message for her doctor. If I take her to the ER it will be at least a 4 hour wait.