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Roche's Obesity Drug Helps Almost 87% People Lose At Least 10% Weight - Roche Holding (OTC:RHHBY)

CT-388 showed a strong dose-response with 95.7% of participants losing over 5% body weight and 26.1% losing over 30% at 48 weeks, with mostly mild gastrointestinal side effects.

  • On Tuesday, Roche Holdings AG released topline CT388-103 Phase 2 results showing CT-388 at 24 mg achieved placebo-adjusted weight loss of 22.5% at 48 weeks with no plateau.
  • Following its Carmot deal, Roche positioned CT-388 as a priority asset, designating it fast-track and accelerating development for a Phase 3 programme expected this quarter.
  • Trial data show strong responder rates at week 48 for the 24 mg dose, with 95.7% exceeding 5% weight loss and mainly mild-to-moderate gastrointestinal adverse events; discontinuation rates were 5.9% study drug versus 1.3% placebo.
  • More than half of CT-388 recipients saw BMI fall below 30 kg/m2, and Roche will present full study results at an upcoming medical meeting while exploring combination with petrelintide.
  • While CT-388 looks competitive with existing dual agonists, late-stage and novel entrants are accelerating as retatrutide recently showed up to 28.7% weight loss and oral rivals could arrive in the coming weeks.
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Lean Right

The company paved the way in the fight against obesity drugs with robust results from the mid-phase clinical trial of CT-388 and is moving towards the start of its late-phase study.

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The Manila Times broke the news in Manila, Philippines (the) on Tuesday, January 27, 2026.
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