I have PM and take steroids, just 2 mg a day. Every now and again I try to reduce or come off them. I do this very very gradually, stopping a 1 mg tabled for one day a week for a month, then increasing it to 2 days a month and so on. I have got to point where I am down to 1 mg a day but then the pain of PM starts to return so I have to back on a higher dose and then reduce back down to my 2mg.
AT the moment I am having a flareup and increased my steroids to 5 megs a day. Will continue this for a month and then see if the flareup has gone by reducing back to 2mg.
It is best to discuss with your Dr first, the dose you are taking is not considered high, the Dr may well do a blood test to see what your inflammation levels are.