http://www.fosamaxfemurfracturelawsuit.com/updates/some-fosamax-users-dont-take-the-drug-regularly/ - It has been reported that a drug manufactured by Merck & Co. Inc., known for its brand name as Fosamax, may cause osteonecrosis of the jaw (ONJ) after prolonged use. Osteonecrosis means bone death. It originates from the Latin word "osteo" which means bone and "necrosis" which means death. Osteonecrosis happens when the blood supply to a bone is suspended. Commonly, it happens at the end part of the bone where blood supply is most at risk. Necrosis is also known as avascular meaning "without blood supply" and ischemic meaning "inadequate blood supply".