I recall complaining to my doctor after the first week or two of prednisone that I'd had only 70% improvement on 15mg start dose and hadn't had the immediate "miracle" pain reduction spoken about by many people. It takes time for prednisone to work fully for some of us. A month in and after splitting the dose to taking most in the morning and a smaller part of it (2mg) later with dinner resolved all the morning pain for me, 95% pain reduction with only minor morning joint stiffness. Sometimes it's not necessary to increase the prednisone dose, it can be just tweaking how we take it and waiting a bit for it to have a chance to reduce the inflammation and pain.