Multiple studies and reviews confirm that space travelers and astronauts utilize or evaluate pharmaceutical interventions, such as bisphosphonates and antiresorptive drugs, to mitigate the skeletal demineralization caused by microgravity.
The claim is specific, empirical, and well-supported by multiple peer-reviewed papers in the retrieved set (e.g., papers 1, 2, and 4) which explicitly discuss the use and development of pharmacological countermeasures against spaceflight-induced bone density loss. There are no papers refuting the claim. Thus, the verdict is SUPPORTED.