So which studies do we believe?  This is unclear.  I think we have to take into account all of the available information before we prescribe or take any medication.    It is important to evaluate your risk of fracture, especially those with osteopenia (and not fractures or osteoporosis) perhaps with assistance of the FRAX® calculator (see my previous blogs, calculator available at http://www.shef.ac.uk/FRAX/) 

It is essential to note, for patients at high risk of fractures, the benefits of fracture prevention will likely outweigh any possible risk of atrial fibrillation.

As always, one should discuss this information with their physician before they start or stop any medications.

See a related question about Fosamax and Atrial Fibrillation.