Clinical trial Recruiting at 36 sites Phase 3 Interventional Ages 18 and up

Once-weekly berobenatide in adults with obesity in Japan

Official title: A PHASE 3, RANDOMIZED, DOUBLE-BLIND, PLACEBO-CONTROLLED STUDY TO ASSESS THE EFFICACY AND SAFETY OF ONCE-WEEKLY BEROBENATIDE IN ADULTS WITH OBESITY DISEASE IN JAPAN (VESPER-JW)

Run by Pfizer · NCT07794761 · Data updated 2026-11-12

This study tests whether once-weekly berobenatide can be safe and effective for adults with obesity in Japan, compared to a placebo.

More Obesity trials

Quick facts

PhasePhase 3
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment180 (estimated)
SponsorPfizer
Industry-sponsored
Locations36 sites (Mihama-ku, Chiba and 35 other locations)
StatusRecruiting
StartedOctober 2, 2026
Main results expectedMarch 14, 2029
Study endsMarch 14, 2029
Registry record updatedNovember 5, 2026
Trial IDNCT07794761 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults 18 years or older with obesity (BMI 27–34.9 with at least two obesity-related health disorders, or BMI ≥35 with at least one such disorder) who may have type 2 diabetes and meet study requirements.

Probably not a fit

Participants who do not respond to the treatment or experience adverse effects may not experience a benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This Phase 3 trial enrolls about 180 adults with obesity in Japan who may also have type 2 diabetes. Participants are randomized to receive either berobenatide injections under the skin or a placebo for a defined period. The study compares safety and treatment effects between the two groups, with attention to obesity-related health conditions. Eligibility includes adults 18 or older with specific BMI ranges and health disorders such as hypertension, dyslipidemia, or glucose intolerance. Exclusion criteria include recent weight changes, certain diabetes types, pancreatitis history, and thyroid-related cancer syndromes. Lead sponsor is Pfizer, with sites in Chiba and Matsuyama.

Why it matters

Potential benefit: If successful, berobenatide could provide a new injectable option to help manage obesity and related health risks.

How similar studies have gone: Prior studies in similar obesity therapies have shown variable safety and efficacy, making this trial important to confirm findings in a Japanese population.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Aged ≥18 years.
* BMI of: ≥27.0 kg/m2 to \<35.0 kg/m2 with ≥2 obesity-related health disorders or BMI of ≥35.0 kg/m2 with ≥1 obesity-related health disorder. The participant must have at least one of either hypertension, dyslipidemia or glucose intolerance (T2D and impaired glucose tolerance etc.) as an obesity-related health disorder.

Exclusion Criteria:

* Have a self-reported body weight change greater than 5% within 90 days prior to Screening.
* Diagnosis of type 1 diabetes or any other form of diabetes other than T2D.
* History of acute or chronic pancreatitis.
* Personal or family history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia type 2 (MEN-2).

Where it's running

  • Tokuyama Clinic
    Mihama-ku, Chiba, Japan
    Recruiting
  • Mikannohana Clinic, Diabetes, Endocrinology and Metabolism
    Matsuyama, Ehime, Japan
    Recruiting
  • Matsuyama Shimin Hospital
    Matsuyama, Ehime, Japan
    Recruiting
  • Tenjin Sogo Clinic
    Fukuoka, Fukuoka, Japan
    Recruiting
  • Medical Corporation BOOCS BOOCS CLINIC FUKUOKA
    Fukuoka, Fukuoka, Japan
    Recruiting
  • Fukuoka Diagnostic Imaging Clinic Me-Well
    Fukuoka, Fukuoka, Japan
    Recruiting
Show 30 more locations
  • Oishi Clinic
    Kasuya-gun, Fukuoka, Japan
    Recruiting
  • Manda Memorial Hospital
    Sapporo, Hokkaido, Japan
    Recruiting
  • Yamasaki Family Clinic
    Amagasaki, Hyōgo, Japan
    Recruiting
  • Minami Akatsuka Clinic
    Mito, Ibaraki, Japan
    Recruiting
  • Mito Saiseikai General Hospital
    Mito, Ibaraki, Japan
    Recruiting
  • Nishiyamado Keiwa Hospital
    Naka, Ibaraki, Japan
    Recruiting
  • Olive Takamatsu Medical Clinic
    Takamatsu, Kagawa-ken, Japan
    Recruiting
  • Medical Corporation Hitomikai Motomachi Takatsuka Naika Clinic
    Yokohama, Kanagawa, Japan
    Recruiting
  • Yokoi Clinic
    Minoh, Osaka, Japan
    Recruiting
  • Kanemura Clinic
    Osaka-shi Ikuno-ku, Osaka, Japan
    Recruiting
  • Medical Corporation Heishinkai OCROM Clinic
    Suita, Osaka, Japan
    Recruiting
  • MI Clinic, Medical Corporation Jinsenkai
    Toyonaka-shi, Osaka, Japan
    Recruiting
  • Soka Sugiura Internal medicine Clinic
    Soka-shi, Saitama, Japan
    Recruiting
  • Saiyu Soka Hospital
    Soka-shi, Saitama, Japan
    Recruiting
  • Doujin Memorial Foundation Meiwa Hospital
    Chiyoda-ku, Tokyo, Japan
    Recruiting
  • AIC Yaesu Clinic
    Chuo-ku, Tokyo, Japan
    Recruiting
  • Tokyo Center Clinic
    Chuo-ku, Tokyo, Japan
    Recruiting
  • Tokyo-Eki Center-building Clinic
    Chuo-ku, Tokyo, Japan
    Recruiting
  • Fukuwa Clinic
    Chuo-ku, Tokyo, Japan
    Recruiting
  • Tokyo Asbo Clinic
    Chuo-ku, Tokyo, Japan
    Recruiting
  • Medical Corp. Seikoukai New Medical Research System Clinic
    Hachioji-shi, Tokyo, Japan
    Recruiting
  • Hachioji Clinic Shincho
    Hachioji-shi, Tokyo, Japan
    Recruiting
  • Keikokai Medical Corporation P-one Clinic
    Hachiōji, Tokyo, Japan
    Recruiting
  • Patient First Clinic Ginza-Shimbashi
    Minato-ku, Tokyo, Japan
    Recruiting
  • Shimamura Memorial Hospital
    Nerima-ku, Tokyo, Japan
    Recruiting
  • Medical Corporation Heishinkai ToCROM Clinic
    Shinjuku-ku, Tokyo, Japan
    Recruiting
  • Seeds Clinic Shinjuku-Sanchome, Eijinkai Medical Corporation
    Shinjuku-ku, Tokyo, Japan
    Recruiting
  • Higashi-Shinjuku Clinic, Keikokai Medical Corp.
    Shinjuku-ku, Tokyo, Japan
    Recruiting
  • Ikebukuro Metropolitan Clinic
    Toshima-ku, Tokyo, Japan
    Recruiting
  • Nihonbashi Sakura Clinic
    Tokyo, Japan
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.