Atrial fibrillation and bisphosphonates: FDA Medwatch update

FDA issued an update to the Agency’s review of safety data regarding the potential increased risk of atrial fibrillation in patients treated with a bisphosphonate drug.

Bisphosphonates marketed as Alendronate (Fosamax, Fosamax Plus D)
Etidronate (Didronel)
Ibandronate (Boniva)
Pamidronate (Aredia)
Risedronate (Actonel, Actonel W/Calcium)
Tiludronate (Skelid)
Zoledronic acid (Reclast, Zometa)

Bisphosphonates are a class of drugs used primarily to increase bone mass and reduce the risk for fracture in patients with osteoporosis, slow bone turnover in patients with Paget’s disease of the bone, and to treat bone metastases and lower elevated levels of blood calcium in patients with cancer. FDA reviewed data on 19,687 bisphosphonate-treated patients and 18,358 placebo-treated patients who were followed for 6 months to 3 years. The occurrence of atrial fibrillation was rare within each study, with most studies containing 2 or fewer events. Across all studies, no clear association between overall bisphosphonate exposure and the rate of serious or non-serious atrial fibrillation was observed. Additionally, increasing dose or duration of bisphosphonate therapy was not associated with an increase rate of atrial fibrillation. Healthcare professionals should not alter their prescribing patterns for bisphosphonates and patients should not stop taking their bisphosphonate medication.

Source: FDA Medwatch

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