Hi and thanks for the query, the fact the rash is evolving despite the drug that you have been using deserves a revaluation of your diagnosis. It is possible it could still be an allergy, but reevaluation of the rashes could be important to re adapt or change the treatment. It is however not excluded that it could also not be an allergy, considering it is spreading it is spreading at a fairly not very rapid rate, and that no actual predisposing allergen is incriminated. Consulting your primary care physician would be necessary in characterizing the rashes and making a distinction between rashes of infectious or allergic origin. This would aid in doing further appropriate testing and exact diagnosis. I suggest you consult you primary care physician for a complete clinical evaluation and management. Thanks and best regards, Luchuo, MD.