Romosozumab: A Newer Treatment for Weak Bones
Romosozumab is a newer medication that can help strengthen bones by both increasing new bone formation and slowing bone loss. Learn how it works and what you need to know about its benefits and risks.
Overview
Osteoporosis is a condition where your bones become weaker and more likely to break. For many years, doctors have treated this with medications like bisphosphonates and denosumab. Now there's a newer option called romosozumab that works differently and may offer additional benefits.
Romosozumab is a monoclonal antibody (a type of protein designed to target specific substances in your body) that blocks a protein called sclerostin. Your bone cells naturally produce sclerostin, which slows down new bone formation. By blocking sclerostin, romosozumab helps your body build new bone while also reducing bone loss.
How It Works
Your bones are constantly changing—old bone is broken down and new bone is built. Sclerostin is a protein that gets in the way of new bone formation. Romosozumab works by blocking sclerostin, which allows your body to build stronger bones and also slows the rate at which bone is broken down.
Benefits
Research shows that romosozumab can reduce the risk of spine fractures more than older treatments alone. In one major study, patients who took romosozumab for one year and then switched to another bone medication (denosumab) had fewer spine fractures in the second year compared to those who only took the other medication.
Another study compared romosozumab followed by alendronate (another common bone medication) to alendronate alone. The romosozumab group had a 48% lower risk of developing new spine fractures.
Treatment Plan
Romosozumab treatment lasts for 12 months. After your 12 months of romosozumab, your doctor will likely switch you to another bone-strengthening medication to continue protecting your bones long-term.
Important Safety Warning
Romosozumab carries a black box warning (the FDA's most serious warning) regarding potential heart and stroke risks. This medication should not be used if you have had a heart attack or stroke within the past year.
Your doctor needs to be especially careful if you have risk factors for heart disease or stroke. Some studies have found higher rates of heart problems and strokes in people taking romosozumab, though the exact reason isn't fully understood.
When to See a Doctor
Talk with your doctor about whether romosozumab is right for you if you have been diagnosed with osteoporosis. Be sure to discuss your complete medical history, especially any heart disease, previous heart attack, stroke, or significant cardiovascular risk factors. Your doctor can help weigh the bone-strengthening benefits against any potential heart-related risks in your individual situation.
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