How long will I need to take steroids for polymyalgia rheumatica?

DEAR DOCTOR K: I have polymyalgia rheumatica. My doctor has prescribed prednisone, but I'm worried about the long-term effects of this treatment. How long will I need to take it?
DEAR READER: Polymyalgia rheumatica (PMR) is a painful, sometimes disabling condition. Fortunately, PMR responds well to proper treatment.