At age 68 after years of slowly dropping DEXA numbers I finally agreed to take oral alendronate, a bisphosphonate. I had dropped into osteoporosis in one hip at -2.9, all other number were close but still labeled osteopenia.
Oral alendronate bothered my stomach, and after 7 weeks, I stopped. I was switched to Reclast, a biphosphonate infusion.
After the first Reclast infusion my DEXA score increased 6% in my spine. I’ve since had a second annual infusion. Generally it’s given in a series of 3. I’m going to ask if my third infusion can be done 2 years after the last, as Reclast is supposed to maintain density at high level for 2 years.

Reclast does not build bone. It stops the turnover of bone, the normal cycle of bone maintenance. Bone normally loses some cells and creates new bone to make up for it. Reclast reduces the loss of bone, and the DEXA score goes up. There are other bone meds, anabolic steroids, that actually build bone. An endocrinologist can help guide you through which might be best for you.
All of these drugs have side effects. I’ve had very little with Reclast.

You’ll find a lot of helpful info from others on this site. Each of us have different medical histories that affect decisions on meds.