The two times I have been on pred I have done a much longer taper, especially once below 10mg. On my current taper, I am dropping by 2mg/week when tapering from 20mg to 10mg and then I will taper by 1mg/week from 10mg to 0mg. My rheumy says that if at any point I notice an increase in symptoms, I should go back up to the previous dosage (so if I have a bad day at 7mg, I should go back to 8mg until it stabilizes).
29f, PhD student, originally diagnosed with Crohn's in 2/06
10/09: Prometheus test shows results consistent with UC
10/12/09: beginning treatment for arthritis
Currently taking: 7.5mg methotrexate weekly (pills), 2g Pentasa, tapering from 20mg prednisone, 150mg Trazadone, multivitamin, vitamin D, magnesium, probiotics, folic acid