<prompt> Nasal spray is available forPTHCalciumCalcitoninOestrogen  <response>: Calcitonin is a polypeptide hormone produced by the thyroid gland. Its physiologic role is unclear because no skeletal disease has been described in association with calcitonin deficiency or excess. Calcitonin preparations are approved by the FDA for Pagets disease, hypercalcemia, and osteoporosis in women 5 years past menopause.A nasal spray containing calcitonin 200 IUd is available for treatment of osteoporosis in postmenopausal women.Ref: Harrison;s Principles of Internal Medicine; 19th edition; Chapter 425 Osteoporosis; Page no: 2501 