@paula630 I thought Reclast increases bone density. It seems like semantics on the part of the doc who said it doesn't "grow bone." Right? Yes, it is not anabolic. It is anti-resorptive and increases density by lowering turnover. As I am sure you know.

from drugs.com "After treatment with Reclast, BMD increased by 11% from baseline after one year of treatment and by 20.7% from baseline after two years of treatment."

Here is what the doc may have been referring to:
ExcretionUrine (39% ± 16% as unchanged drug) within 24 hours; feces (< 3%)
Half-Life Elimination Triphasic; Terminal: 146 hours
so yeah techically it is "eliminated" relatively quickly but stays around for a long time in bone...

So technically Reclast is "elminated" fairly quickly (via urine) but remains in bone for years and is slowly released. Again the doctor's comments seem like semantics.
From drugs.com:
Zoledronic acid, which is the active ingredient in Reclast, can remain in your body for weeks or years after your last dose1. Reclast is an effective treatment and should improve bone density for around 2-3 years after a person stops treatment2. Side effects such as bone, joint, or musculoskeletal pain may occur days, months, or years after starting therapy3.

I have read somewhere that it can last 10 years. I am not sure. Ask the doc!

I have been concerned about osteoarthritis and bone spurs getting worse on Reclast and especially Evenity but not sure that is studied. Please share if you find anything. Time will tell. Most of the drug info sites mention spinal and joint pain. I have two autoimmune diseases and tend to have a lot of side effects.

Bur for many it is helpful and doesn't have bad side effects. Unfortunately we need it or Fosamax after other meds.