The story
Probably from a(minobuty)l(id)ene + -dronic (“calcium metabolism regulator, from ethidronic acid derivatives, EThane-1-HYDRoxy-1,1- diphosphONIC acid”) acid.
Etymology from Wiktionary, CC BY-SA 4.0.
alendronic acid
Today it means: A bisphosphonate C₄H₁₃NO₇P₂ used to inhibit bone resorption especially in the treatment of osteoporosis in postmenopausal women and Paget's disease of bone. Trade names include Fosamax and possibly others. Full definition →