Why do some osteoporosis drugs cause rare thigh breaks? scientists hunt for answers.

NCT ID NCT04110795

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study compares 330 people who had a rare thigh bone fracture while on osteoporosis medication with 660 similar patients who did not. Researchers are looking for genetic differences and other clinical factors that might explain why some people get these fractures. The goal is to better predict risk and personalize osteoporosis care.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

What this could lead to
If successful, this could help doctors identify who is at higher risk for atypical femur fractures before prescribing osteoporosis medications.
What could go wrong
This is an observational study, not a treatment trial. It may not find clear genetic links, and results may not change clinical practice for years.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Contacts and locations

Locations

  • Adachi Medical Centre

    Hamilton, Ontario, L8N 1Y2, Canada

  • Bone Research & Education Centre

    Oakville, Ontario, L6M 1M1, Canada

  • University Health Network, TGH

    Toronto, Ontario, M5G 2C4, Canada

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