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NCT Number: NCT06973720

A Phase 2b Study to Evaluate the Efficacy and Safety of Once-Monthly MET097 in Adults With Obesity or Overweight

This study is designed to test the weight loss effects, safety, and tolerability of multiple monthly doses of MET097 after 12 weekly doses, compared to placebo. Participants are eligible if they have overweight or obesity and do not have type 2 diabetes.

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This study is active but is not currently recruiting participants.

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Key information

Age range

18 year–70 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

Research Centers of America, Hollywood, Florida, United States

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About this study

This is a multi-center, randomized, double-blind, placebo-controlled study to investigate the efficacy, safety and tolerability of multiple once monthly (QM) dose levels of MET097 after 12 once weekly (QW) doses, compared to placebo. The study will include adult participants with obesity or overweight. Participants will initially receive once weekly MET097 with or without titration or placebo for 12 weeks. Participants will then transition to a four-fold higher monthly dose for a total of 13 monthly doses. The primary endpoint is at Week 28, four weeks after the fourth monthly dose. All participants will be followed for ~5 half-lives after administration of the last dose for safety.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Body mass index (BMI) at Screening of:
  • BMI ≥30 kg/m2 and ≤50.0 kg/m2 (can have the weight-related co-morbidities listed below)
  • BMI ≥27.0 kg/m2 to <30.0 kg/m2 with at least one of the following weight-related co-morbidities:
  • Hypertension: on blood pressure (BP)-lowering medication or having systolic BP ≥130 mmHg or diastolic BP ≥80 mmHg at Screening
  • Dyslipidemia: on lipid-lowering medication or having low-density lipoprotein cholesterol (LDL-C) ≥160 mg/dL (4.1 mmol/L) or triglycerides ≥150 mg/dL (1.7 mmol/L), or high-density lipoprotein-cholesterol (HDL-C) <40 mg/dL (1.0 mmol/L) for men or HDL-C <50 mg/dL (1.3 mmol/L) for women at Screening
  • Stable body weight (increase or decrease ≤5 kg) within 3 months prior to Screening

Exclusion criteria

  • Diagnosis of diabetes (T1DM or T2DM) or glycated hemoglobin A1c (HbA1c) ≥ 6.5% or fasting plasma glucose >125 mg/dL.
  • Estimated glomerular filtration rate (eGFR) <75 mL/min/1.73 m2
  • History of pancreatitis
  • Family or personal history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia syndrome type 2 (MEN-2)
  • History of significant active or unstable major depressive disorder (MDD) or other severe psychiatric disorder within the last 2 years
  • Poorly controlled hypertension at, defined as any of the following:
  • Mean seated systolic BP ≥160 mm Hg or mean seated diastolic BP ≥95 mm Hg at Screening visit
  • A change in antihypertensive medications within 30 days of Screening visit
  • Renal artery stenosis, or evidence of labile blood pressure including symptomatic postural hypotension at Screening; postural hypotension is defined as a sustained reduction of systolic blood pressure of at least 20 mmHg or diastolic blood pressure of 10 mmHg, with or without symptoms during the assessment, within three minutes of standing
  • Thyroid-stimulating hormone (TSH) level lower than 0.4 mIU/L or higher than 6.0 mIU/L at the Screening visit. Note: participants receiving treatment for hypothyroidism may be included, provided their thyroid hormone replacement dose has been stable for at least 6 months

Treatment and study plan

MET097

Drug

For subcutaneous administration.

Placebo

Drug

Sterile 0.9% (w/v) saline for subcutaneous administration.

Primary outcomes

  1. Percent change from baseline in body weight at Week 28

    Time frame: Baseline (Week 0) through Week 28 (Day 197)

    Evaluate the efficacy at Week 28 of four dose regimens of QW MET097 switching to QM compared to placebo.

Secondary outcomes

  1. Percent change from baseline in body weight at Week 64

    Time frame: Baseline (Week 0) through Week 64 (Day 449)

  2. Percent change from baseline in body weight at all other post-baseline weight measurements up to Week 64 other than Week 28

    Time frame: Baseline (Week 0) through Week 24 (Day 169); Week 32 (Day 225) through Week 64 (Day 449)

  3. Change from baseline in absolute bodyweight (in kg) at all protocol-specified weekly and monthly post-baseline measurements

    Time frame: Baseline (Week 0) through Week 64 (Day 449)

  4. Change from baseline in body mass index (BMI) at all protocol-specified weekly and monthly post-baseline measurements

    Time frame: Baseline (Week 0) through Week 64 (Day 449)

  5. Change from baseline in waist circumference (in cm) at all protocol-specified weekly and monthly post-baseline measurements

    Time frame: Baseline (Week 0) through Week 64 (Day 449)

  6. Percent change from baseline in body weight at post-treatment follow-up

    Time frame: Baseline (Week 0) through Week 72 (Day 505)

  7. Change from baseline in absolute bodyweight (in kg) at post-treatment follow-up

    Time frame: Baseline (Week 0) through Week 72 (Day 505)

  8. Change from baseline in body mass index (BMI) at post-treatment follow-up

    Time frame: Baseline (Week 0) through Week 72 (Day 505)

  9. Change from baseline in waist circumference (in cm) at post-treatment follow-up

    Time frame: Baseline (Week 0) through Week 72 (Day 505)

  10. Occurrence of treatment emergent adverse events (TEAEs)

    Time frame: Baseline (Week 0) through Week 72 (Day 505)

  11. Minimum observed concentration (Cmin)

    Time frame: Baseline (Week 0) through Week 72 (Day 505)

  12. Area under the concentration versus time curve during the dosing interval (AUC)

    Time frame: Baseline (Week 0) through Week 72 (Day 505)

  13. Maximum observed concentration (Cmax)

    Time frame: Baseline (Week 0) through Week 72 (Day 505)

  14. Time to maximum concentration (Tmax)

    Time frame: Baseline (Week 0) through Week 72 (Day 505)

Sponsors and collaborators

Lead sponsor

Pfizer

Industry

Registry information

Official study title

A Phase 2b, Multi-Center, Randomized, Double-Blind, Placebo-Controlled Study to Investigate the Efficacy, Safety and Tolerability of Multiple Dose Regimens of Once-Weekly Switching to Once-Monthly MET097 in Participants With Obesity or Overweight (VESPER-3)

Acronym: VESPER-3

Important dates

Study start
2025
Primary completion
2025
Study completion
2026
First posted
May 15, 2025
Registry last updated
May 29, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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