Yes, I was diagnosed with osteopenia caused by high doses of prednisone when I was first diagnosed and was very ill. I was already at risk, being a small-boned, white female.
Since that time, I have successfully reversed my bone loss through healing the gut, improved nutrition, cardio and weight training. I did it without using osteoporosis drugs or even calcium supplements, so take heart. It is within your control to improve your bone density... especially since you've become aware of the problem before it becomes full blown osteoporosis.