Question · Q4 2025
Dave Risinger from Leerink Partners asked for more details on MET233I (now 3945), specifically its amylin bias relative to calcitonin, implications for efficacy and tolerability, and expected data at ADA.
Answer
Dr. Chris Boshoff, Chief Scientific Officer, Pfizer, described 3945 as an ultra-long-acting amylin with previously shown monotherapy efficacy of 8.4% placebo-adjusted weight loss at day 36 and placebo-like tolerability. He clarified it's a dual molecule, not biased to one receptor. He reiterated that early combination data showed 5% weight loss at day 8, with updated data expected later this year, emphasizing its potential for best-in-class efficacy with monthly dosing.
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