Question · Q3 2025
Steven asked about the anticipated length of Setrusumab treatment for OI, the potential for combination or cyclical use with bisphosphonates, and whether continuous Setrusumab use is expected. He also inquired about concerns regarding bone pain from switching off bisphosphonates.
Answer
Howard Horn, Chief Financial Officer, expressed a personal opinion that bisphosphonates would become obsolete for OI, as Setrusumab enables normal bone metabolism and chronic therapy is necessary to maintain gains. He noted FDA concerns about long-term bisphosphonate use and stated that Setrusumab is a chronic treatment designed to rebalance bone production and resorption. Joshua Higa, VP of Investor Relations, reiterated that Setrusumab represents the future for OI treatment.
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