Numb, Pred frequently causes severe muscle cramping in the legs and feet. Sometimes increasing your potassium helps with this. Pantoloc can cause muscle or joint pain, although it's an uncommon side effect. Imuran may cause fatigue or nausea, but muscle pain isn't cited as a side effect. Your most likely culprit is the Pred.
Don't give up on the Imuran - it takes anywhere from one to three months, occasionally as long as six months, to become effective. That's why the Pred is continued after you start Imuran. Try not to stress over it, that only makes things worse.
Moderate to severe left-sided UC (21 cm) diagnosed 2001.
Asacol, Rowasa, Pentasa, Prednisone, Entocort, Azathioprine
Colazal, Remicade, Nature's Way Primadophilus Reuteri.
In remission since April, 2006. Remicade has been my wonder drug.
Co-Moderator UC Forum