<unk>  or pamidronate disodium or APD (marketed as Aredia among others), is a nitrogen-containing bisphosphonate used to prevent osteoporosis. It was patented in 1971 and approved for medical use in 1987.
Pamidronic acid
Etidronic acid
Risedronic acid
Medronic acid
Alendronic acid
Zoledronic acid
Ibandronic acid
Denosumab