Osteoporosis drug ‘risks heart’.BBCnews,April28, 2008.Women who take the drug Fosamax for osteoporosis may be at an increased risk of developing an irregular heartbeat, a US study suggests. Researchers have linked the drug – widely prescribed in the UK to stop bone-thinning in older women – to a condition known as atrial fibrillation. [ See ]. See related our article: Esophagitis associated with use of alendronate in 5 postmenopausic patients