Yes- provided it works for HIM, it is fine. I was on a short taper of 2 weeks each 15/10/5mg and each step down worked like a dream - until the day after I took the last 5mg tablets and I was in agony! Lots of patients would be put on that sort of dose for 10 days and stop for other things. The 15mg needs to be for 3 to 4 weeks though. No rushing there.
If, on the other hand, after dropping the 5mg the PMR symptoms return, go back to 20mg and step down via 17.5mg, And if the putative PMR symptoms are still there after the two weeks - ask the GP what they want him to do. No change at 20mg either means he needs a bit more or it isn't PMR. It COULD be GCA with pain in shoulders and neck - think that was where DL had the most trouble.
My rheumatologist gave me only 5mg tablets when diagnosed and wanted me to drop from 20mg to 15mg after three weeks. In my case it was with disastrous results, but some people manage it.
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