
Lilly’s triple-hormone obesity drug posts strong Phase 3 weight loss, but data gaps temper optimism
Lilly’s triple-G obesity drug retatrutide met primary endpoints in Phase 3 TRIUMPH-1, delivering up to 28.3% weight loss at 80 weeks for the highest dose on the efficacy estimand (vs 2.2% for placebo). On the treatment-regimen estimand, weight losses were 17.6% (4 mg), 23.7% (9 mg) and 25% (12 mg) with placebo at 3.9%. A Week 104 readout for the top dose reached 29.9% among patients who stayed on therapy. The topline did not include sleep apnea or osteoarthritis pain data. Safety showed higher discontinuations at the high dose (11.3% vs 4.9% placebo) and notable dysesthesia (20.9% at high dose); GI adverse events were more common at the low dose. Analysts said the results meet key endpoints but didn’t exceed expectations, and Lilly is eyeing possible FDA submission this year amid competition from Wegovy and other obesity drugs.













