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Pfizer said Tuesday that the monthly injection that was one of the cornerstones of its $10 billion buyout of Metsera allowed obesity patients to lose up to 10.5% of their weight, on a placebo-adjusted basis, after just over six months.
The data are from the Phase 2b VESPER-3 study, testing weekly doses of PF-08653944 (also known as MET-097i) titrated up to 1.2 mg for 12 weeks, and then monthly doses of 4.8 mg for another 16 weeks. For the treatment policy estimand, which uses all available weight measurements regardless of treatment adherence, placebo-adjusted weight loss was 8.4% for Arm 1 and 10.5% for Arm 3.