Actonel Combi is a medication specifically designed for the treatment of osteoporosis in postmenopausal women. It is a combination therapy that includes both risedronate sodium, a bisphosphonate that helps to slow bone loss while increasing bone mass, and calcium carbonate/vitamin D3, essential components for bone health. Risedronate sodium works by altering the cycle of bone formation and breakdown in the body, effectively preventing bone fractures. Calcium carbonate is a form of calcium supplement, and vitamin D3 enhances the absorption of calcium and phosphorus from the intestine, which are crucial for maintaining healthy bones. Actonel Combi is typically prescribed to individuals at high risk of fractures associated with osteoporosis, aiming to strengthen bones and reduce the likelihood of fractures.