abdominal, stomach, or back
pain, dizziness, fever, loss of appetite, muscle or
joint pain, reappearance of disease symptoms, shortness of breath, unexplained headaches (frequent or continuing), unusual tiredness or weakness, vomiting or rapid weight loss.
http://ibdcrohns.about.com/cs/prescriptiondrugs/p/medprednisone.htm
Prolonged use of prednisolone can depress the ability of body's adrenal glands to produce corticosteroids.