18+ · Research Use Only · Not for Human Consumption

Tirzepatide · Phase 3 · Completed

SURMOUNT-2

In SURMOUNT-2, a phase 3 trial of tirzepatide in adults (18 or older) with BMI of 27 kg/m2 or higher and type 2 diabetes with HbA1c 7-10% (53-86 mmol/mol), in seven countries (n=938), mean body weight fell 12.8% on 10 mg and 14.7% on 15 mg over 72 weeks, against 3.2% on placebo (treatment-regimen estimand; Garvey WT et al. Lancet 2023 (SURMOUNT-2)).

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Results

SURMOUNT-2: mean percent change in body weight by armSURMOUNT-2 treatment-regimen estimand10 mg-12.8%15 mg-14.7%Placebo-3.2%
Mean percent change in body weight by arm, as each source reports it. Bars from different trials are not a head-to-head comparison: populations, durations and estimands differ.

Side effects reported

SURMOUNT-2: The abstract reports that few adverse events led to discontinuation (under 5%) without per-arm figures.

Design

Trial design and sources

Compound
Tirzepatide
Phase
3
Population
Adults (18 or older) with BMI of 27 kg/m2 or higher and type 2 diabetes with HbA1c 7-10% (53-86 mmol/mol), in seven countries
Participants randomised
938
Duration
72 weeks
Primary endpoint
Coprimary: percent change in bodyweight from baseline and bodyweight reduction of 5% or higher (week 72)
Estimand
treatment-regimen
Read out
26 June 2023

The abstract reports that few adverse events led to discontinuation (under 5%) without per-arm figures.

  • Garvey WT et al. Lancet 2023 (SURMOUNT-2) open · checked 23 September 2026
  • ClinicalTrials.gov NCT04657003 open · checked 23 September 2026
  • Registry: NCT04657003

Questions

SURMOUNT-2, answered

What did SURMOUNT-2 find?

In SURMOUNT-2, a phase 3 trial of tirzepatide in adults (18 or older) with BMI of 27 kg/m2 or higher and type 2 diabetes with HbA1c 7-10% (53-86 mmol/mol), in seven countries (n=938), mean body weight fell 12.8% on 10 mg and 14.7% on 15 mg over 72 weeks, against 3.2% on placebo (treatment-regimen estimand; Garvey WT et al. Lancet 2023 (SURMOUNT-2)).

What side effects were reported in SURMOUNT-2?

SURMOUNT-2: The abstract reports that few adverse events led to discontinuation (under 5%) without per-arm figures.