Teriparatide can be used for the treatment of :
**Core Concept**
Teriparatide is a recombinant form of parathyroid hormone (PTH) used in the treatment of osteoporosis. It works by stimulating osteoblasts to increase bone formation, which helps to increase bone density and reduce the risk of fractures.
**Why the Correct Answer is Right**
Teriparatide is the first FDA-approved medication for the treatment of osteoporosis in men and women. It has been shown to increase bone mineral density in the lumbar spine and hip, reducing the risk of vertebral and non-vertebral fractures. Teriparatide works by activating PTH receptors on osteoblasts, which increases the expression of genes involved in bone formation. This leads to an increase in osteoblast activity, which in turn increases bone density.
**Why Each Wrong Option is Incorrect**
**Option A:** Teriparatide is not used to treat hyperparathyroidism, as its primary use is to stimulate bone formation, not to decrease PTH levels.
**Option B:** While teriparatide may have some effects on calcium and phosphorus metabolism, it is not primarily used to treat hypocalcemia.
**Option C:** Teriparatide is not used to treat osteopenia, as it is specifically approved for the treatment of osteoporosis.
**Clinical Pearl / High-Yield Fact**
Teriparatide has a unique mechanism of action that distinguishes it from other osteoporosis treatments, such as bisphosphonates, which primarily work by inhibiting osteoclast activity.
**Correct Answer: C. Osteoporosis**