Here's an osteoporosis drug that isn't approved yet and has been trying for the past several years to be approved.
Pfizer submitted the current application for lasofoxifene on December 18, 2007. On September 8, 2008, an FDA scientific advisory panel voted 9-3 (with one abstention) that there is a population of postmenopausal women with osteoporosis in which the benefits of lasofoxifene likely outweigh the risks. FDA is not required to follow the advice of the panel.
This doesn't sound convincing to me.
Osteoporosis drugs are not without terrible side effects and drugs taken for gastric ulcers can cause osteoporosis.