I guess its both the long term and some of the short term side effects.
Short term side effects vary in different people - moon face. weight gain. sleeplessness, mood swings (Im sure there is more but cant think right now )
Long term effects it is hard on your organs, risk of diabetes, cataracts (and I know there is more than that too).
I was on it for 7 years straight varying doses from 120mg down to maintenance doses of between 5-20mgs. I have only been off it since April and am really starting to feel bad.
I wish I could use it as my maintenance med but until the Humira kicked in I thought I was running out of mgs when a maintence of 20 wasnt cutting it.
When you look at it all the meds we take have side effects, so we are really darned if we do darned if we dont.
To me pred was a lifesaver - I hope it does the same for you.
Jo