The drugs, called alendronate and zoledronic acid, are taken to build bone density and as well as to slow down the progression of osteoporosis, which affects more than 3million people in Britain.

• 阿屈膦酸盐和唑来磷酸这类药物，除能减缓骨质疏松外，还用来增强骨密度，英国有300万人患有骨质疏松。