HC Reform Update from Mark Sanna: The Food and Drug Administration issued a warning this week linking long-term use of popular osteoporosis drugs to an unusual fracture of the thigh bone. The agency asked patients taking the drugs, known as bisphosphonates, to report any thigh or groin pain to their doctors. At the same time, the F.D.A. safety announcement emphasized that people should continue taking the drugs unless their doctors advise otherwise.