what is alendronic acid
Alendronic acid (INN) or alendronate sodium (USAN) â sold as Fosamax by Merck â is a bisphosphonate drug used for osteoporosis and several other bone diseases.It is marketed alone as well as in combination with vitamin D (2,800 IU and 5,600 IU, under the name Fosamax+D).Merck's U.S. patent on alendronate expired in 2008 and the drug is now available as a generic.t is marketed alone as well as in combination with vitamin D (2,800 IU and 5,600 IU, under the name Fosamax+D). Merck's U.S. patent on alendronate expired in 2008 and the drug is now available as a generic.