@jules11, I do not have PMR. I took prednisone (5 mg) after organ transplant for around 6 years. I was surprised that even at that small dose that I felt side effects. I do not know what the effects are or if they might be different due to PMR. I do not know what your individual tapering will be like, I only intended to share how I managed my taper.
I did experience pain, headaches, stiffness, tiredness. But because I understood the reason for those discomforts, I was able to accept the temporary discomfort. I also found out that the prednisone must have been masking a kind of asthma that occurs during activity and humid weather. But I have that under control now.
Sending you strength and patience.