Clinical efficacy in the treatment of post-menopausal osteoporosis (PFT) The efficacy and safety of Aclasta 5 mg once a year for 3 consecutive years were demonstrated in post-menopausal women (7,736 women aged 65– 89 years) with either: a femoral neck bone mineral density (BMD) with a T-score ≤ – 1.5 and at least two mild or one moderate existing vertebral fracture(s); or a femoral neck BMD T-score ≤ – 2.5 with or without evidence of existing vertebral fracture(s).