My son (45yo) has had osteoporosis and osteopenia for many years, discovered when he fell out of bed and broke his back several years back.
He was on Fosamax, which likely contributed to his femur breaking about 3 years ago, as it is now associated with brittle bones.
He could not stand the daily shots of Forteo, so is now on Prolea - 2 shots per year.
We will see what happens