Boniva is used to treat or prevent osteoporosis in women after menopause. Boniva may increase bone mass by slowing loss of bone in most women who take it, even though they won’t be able to see or feel a difference. Boniva may help lower the chances of breaking bones (fractures). For Boniva to treat or prevent osteoporosis, you have to take it as prescribed. Boniva will not work if you stop taking it.