I am so glad I found this sight! For all Prednisone users out there...I was prescribed Prednisone for an upper respiratory infection (I had for 9 months). I was prescribed a 21-day 'taper down' course five (5) times; in actuality not all that much...if I had only known what this drug would do to my body! Besides the insatiable hunger and weight gain (5 - 7 lbs. weight gain per course of the drug), the swollen face/neck, muscle aches, double-vision, sleeplessness - I have been through the worst three (3) years of my life since taking this 'drug'! Three years ago, I had the worst knee pain (in both knees). The orthopedists said tendinitis, bursitis, IT band syndrome...finally a new ortho. ordered an MRI and found out I had Stage II Avascular Necrosis (AVN) in both knees. This is a condition where the blood flow has STOPPED reaching a certain area of the body. It is a side effect of this so-called 'wonder drug' (Prednisone). I had the surgery that is used for AVN (Core Bone Decompression) - it did NOT work! They tried other surgical procedures to no avail. A big issue was that AVN in the knee is very rare. AVN commonly strikes in the hip. There was little or no medical documentation on how to treat AVN in the knee(s). A year later, I ended up having total knee replacements in both knees. Last summer (Summer '06) I broke a bone in my pinky finger by barely hitting a wall in frustration over all this. My bones are extremely brittle from this drug. I am sitting writing this after having dental (oral) surgery because I have lost four (4) teeth as a result of this drug! I need over $7,000 in dental work (implants/bone grafting) that insurance does not cover as a side effect from this drug. I realize that some people out there must take this drug...If you have taken this drug, and have pain in your hips and/or knees, please ask your doctor for an MRI (AVN can not be seen in X-ray until end stage - when the joint collapses from lack of blood flow) and see your dentist regularly. I am only 34 years old and if I can reach just one person regarding the side effects of Prednisone, I will sleep better tonight!