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.
Quick facts
| Phase | Phase 3 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 180 (estimated) |
| Sponsor | Pfizer Industry-sponsored |
| Locations | 36 sites (Mihama-ku, Chiba and 35 other locations) |
| Status | Recruiting |
| Started | October 2, 2026 |
| Main results expected | March 14, 2029 |
| Study ends | March 14, 2029 |
| Registry record updated | November 5, 2026 |
| Trial ID | NCT07794761 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
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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
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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
- Study coordinator: Pfizer CT.gov Call Center
- Email: ClinicalTrials.gov_Inquiries@pfizer.com
- Phone: 1-800-718-1021
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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-
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-
Berobenatide for knee pain in adults who are overweight or with obesity
This study tests berobenatide vs. placebo to see if it reduces knee pain and improves function while helping with weight in adults with knee osteoarthritis and overweight/obesity.
-
Weekly berobenatide for knee osteoarthritis in adults who are overweight or obese
This study tests whether weekly berobenatide helps reduce knee pain and improve function, while also affecting body weight, in adults with knee osteoarthritis who are overweight or obese (with or without type 2 diabetes).
-
Maridebart cafraglutide in people who switched from weekly GLP-1 receptor agonists
This study tests how much maridebart cafraglutide appears in the blood after people with overweight or obesity switch from weekly GLP-1 receptor agonists.
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EloraTZP for weight loss in adults with overweight/obesity and type 2 diabetes
This trial tests whether a coformulation of eloralintide and tirzepatide helps people with obesity or overweight and type 2 diabetes lose weight compared with tirzepatide alone.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.