Teriparatide is used primarily in the treatment of osteoporosis, particularly in postmenopausal women and men at high risk of fractures. It works by stimulating bone formation, increasing bone mineral density, and improving bone strength, which helps reduce the likelihood of vertebral and non-vertebral fractures. It is especially beneficial for patients who have already experienced a fracture or who have not responded well to other osteoporosis medications. Teriparatide is administered via daily injection and is typically prescribed for a limited duration, usually up to two years, due to its mechanism of action and safety profile. It is also used in certain cases of hypoparathyroidism and other rare bone disorders where enhanced bone growth is required.