What is the first-line pharmacologic treatment for osteoporosis?

• A. Bisphosphonates
• B. Estrogen therapy
• C. Calcitonin
• D. Teriparatide

Answer: (A)

Bisphosphonates are the first-line pharmacologic treatment for osteoporosis. They work by inhibiting osteoclast-mediated bone resorption, which lowers bone turnover and, over time, increases bone density. This mechanism translates into a proven reduction in fracture risk, particularly for vertebral fractures, with solid trial data supporting agents like alendronate and its peers. The practical advantages are strong: they’re cost-effective, available as convenient dosing (weekly or monthly oral, or yearly IV with certain agents), and thus widely used.

To get the best results, ensure adequate calcium and vitamin D before starting, and follow administration precautions for oral forms (take with a full glass of water, first thing in the morning, at least 30 minutes before food or other meds, and remain upright). Be mindful of rare but serious risks that can arise with long-term use, such as osteonecrosis of the jaw and atypical femoral fractures, which is why clinicians reassess therapy after several years.

Estrogen therapy carries substantial risks (cardiovascular, cancer-related) and is not used as a first-line osteoporosis treatment. Calcitonin is less effective and used less often, and teriparatide, though an anabolic option, is typically reserved for higher-risk patients or after antiresorptive failure due to cost and administration requirements.