Bisphosphonates: Alendronate, Clodronate, and Zoledronate for Bone Loss Reduction

Alendronate, clodronate, and zoledronate are bisphosphonates that reduce bone loss by inhibiting bone resorption49. However, it has been found that the effectiveness of alendronate decreases over time. This could be due to the gradual increase in tolerance or the balance of bone remodeling. On the other hand, clodronate is more effective at 12 months compared to 6 months, possibly because it has a higher rate of absorption50. Zoledronate, as a long-acting bisphosphonate, consistently exhibits stable effects for most of the time, which may be attributed to its unique mechanism of inhibiting bone resorption51.