I was unable to be prescribed Alendronic Acid and have been taking Strontium Ranelate from the start, though I misguidedly gave myself a break for a few months. A Dexa scan revealed a degree of osteoporosis in the neck of my left femur (the right one is already a prosthesis). I also have AdCal daily. However, there are now serious concerns about side effects of Strontium Ranelate: according to the MHRA there is a risk of 'cardiac disorder'. I will take this up with my GP this week. Should I be more concerned about osteoporosis or having a heart attack?