High Quality Content by WIKIPEDIA articles! Preotact is a pharmaceutical form of parathyroid hormone (H05AA03) manufactured using a strain of Escherichia coli modified by recombinant DNA technology. Preotact is used in the treatment of osteoporosis in postmenopausal women at high risk of osteoporotic fractures. A significant reduction in the incidence of vertebral fractures has been demonstrated. Preotact is marketed in Europe by Nycomed. PreosTM is a registered trade mark owned by NPS Pharmaceuticals, Inc. The name PreosTM and the New Drug Application is pending approval by the U.S. Food and Drug Administration (FDA).