Fosamax (alendronate) comes from the medicines group called as bisphosphonates and works by altering the bone formation cycle and breakdown in the human body. Fosamax increases bone mass and restricts bone loss, thus helping to prevent bone fractures. You should talk to the doctor for detail information on Fosamax and other multiple uses. One should buy Fosamax online or from a drugstore only after consulting with the doctor about the multiple benefits and risks, though risks are minimal.