Fifteen women were included in Lane's analysis. The average time on fosamax was 5.4 years before they experienced the unusual femur fracture. Of these 15, 10 women had similar, atypical fractures. These women had been taking fosamax for an average of 7.3 years, while the remaining five had only been on the drug for an average of 2.8 years.
http://www.bio-medicine.org/medicine-news-1/Fosamax-Linked-to-Unusual-Femur-Fractures-14763-1/
http://www.bio-medicine.org/medicine-news-1/Fosamax-Linked-to-Unusual-Femur-Fractures-14763-1/