I have been using Efudex on my face for ten days now. I have four more days to go. My face is extremely itchy and uncomfortable. Can I apply/use Cortisone cream on my face while using the Efudex to alleviate the itching? I don't know if cortisone cream is contraindicated with Efudex. If it is, can anyone recommend anything I can use to alleviate the itching?