I know with my mom, it did not work that way
for her. She was on bone drugs, calcium/Vit.D
for 20 yrs total and still developed
osteoporosis with 2 compression fractures in her back. Finally at 79, (she's 80 now), they said, no more bone drugs, they aren't working. She started out with Fosamax, and after awhile when side effects start from that one, and Actonel was available, they put her on Actonel and she was on Actonel all the way up until it was stopped at 79.