Have had extreme shoulder pain for a week, sleeping only 4 to 5 hours a night. I am on 7mg of Prednisone for a month following 2 wks. of 10 mg. My daughter suggested taking Benadryl to sleep. I did and slept 8 hrs. and woke to a painless shoulder. Now it's mid morning and the pain has returned in full force. I think this is very strange and wonder if allergies has something to do with PMR. I see the rheumatologist on Monday and will ask!