At least with Forteo you can always stop it if you happen to get that side effect, but being off a bone medication all together is risky if that was what was recommended. I had slight gain with Forteo, but lost the weight after I completed it. I was also way less mobile due to fractures at the time. 5 years later, I am doing Forteo again, just started 5th month and weight loss of 6 pounds, no gain in weight at all.