I'm 71 year old man - diagnosed with PMR last spring and now tapered down to 11/12mgs pred from starting dose of 30mgs. One of the side effects of pred which doesn't seem to be widely mentioned is the possibility of steroid -induced hyperglycemia(high blood sugar). Symptoms are extreme tiredness and excessive thirst/urination.
I assumed my excessive thirst was because of last years hot summer, and unusually frequent peeing because of excessive drinking. Of course fatigue/tiredness is a symptom of PMR anyway (also of pernicious anaemia which I also have)
When I eventually when to doc in the autumn, when the weather had cooled down, it turned out that my blood sugar levels were dangerously high. Now on drugs to sort it but this may act as a warning to others in our PMR club.