Hi, thanks. I had an injection of Kenalog (cortisone) about 48 hours ago into my hip joint, guided by ultrasound. The past two nights I have barely slept, just lying there in wakefulness, and this morning I had a red flush across the part of my cheeks nearer to my nose and across the bridge of my nose. No itching, no other symptoms that I can tell. The injection is supposed to last between 4-6 months or even up to a year (it s the first I ve ever had). I called my doc s office and an assistant got back to me and told me the doctor said I was likely allergic to the medication and to take Benadryl. While that might get me some sleep tonight, I want to understand how strong of an allergic reaction this is ... and when I can expect normal sleep to return, and what it means to be allergic to something that is going to linger in my hip joint for a long, long time. I don t want to take diphenhydramine every night for the foreseeable future, and I don t know how long this type of allergic reaction should last. Also, if I take no medication, what else can I do to help my body process its response (besides drinking a lot of water). I m hoping to speak to my doc tomorrow, but this was the only answer I ve gotten so far to the question I ve left him with. Thanks for your help!