This 2-arm study was designed to assess the long-term safety and tolerability of intravenous (IV) treatment with 2 mg or 3 mg Bonviva in women with post-menopausal osteoporosis who had previously completed Bonviva study BM16550 (DIVA study; NCT00048074). Patients received Bonviva either 2 mg IV every 2 months, or 3 mg IV every 3 months. Patients also received daily supplementation with vitamin D and calcium. The anticipated time on study treatment was 2+ years, and the target sample size was 500+ individuals.