๐Ÿ›๏ธ Verified NIH Record โ€ข Updated 2026-08-14

A Study of PF-08653945 and PF-08653944 in Adults With Overweight or Obesity (SOLIS-1) (NCT07575932)

A PHASE 2B, RANDOMIZED, PLACEBO-CONTROLLED, DOUBLE-BLIND, DOSE RANGING, DOSE-FINDING, UMBRELLA STUDY TO EVALUATE EFFICACY AND SAFETY OF PF-08653945 AND PF-08653944, ALONE OR IN COMBINATION, IN ADULTS WITH OVERWEIGHT OR OBESITY (SOLIS-1)

๐ŸŸข Recruiting Phase2 ๐Ÿ’Š Investigational Drug / Biologic Sponsor: Pfizer

๐Ÿฉบ Plain-English Summary (8th-Grade Level)

This study is being done to learn about the safety and effects of the study drugs, PF-08653945 and PF-08653944, when given alone or together for weight loss, compared to a placebo (a dummy drug that has no active ingredient in it).

Who can join: Review the eligibility criteria below.

Location: Arizona Clinical Trials-Chandler โ€” Chandler, Arizona

Age range: 18 Years

๐Ÿงช Interventions in This Study

๐Ÿ“‹ "Do I Qualify?" โ€” 1-Minute Self Screener

Instant Checklist

Full eligibility criteria are available on the official NIH protocol. View the criteria โ†—

๐Ÿ“ All Participating Trial Locations (65 Sites)

Showing the first 25 of 65 sites.

  • Arizona Clinical Trials-Chandler โ€” Chandler, Arizona
  • Clinical Research Institute of Arizona โ€” Sun City West, Arizona
  • Arizona Clinical Trials (ACT) - Tucson โ€” Tucson, Arizona
  • San Fernando Valley Health Institute โ€” Canoga Park, California
  • Ark Clinical Research โ€” Fountain Valley, California
  • Paragon Rx Clinical โ€” Garden Grove, California
  • Torrance Clinical Research Institute, Inc. โ€” Lomita, California
  • Ark Clinical Research โ€” Long Beach, California
  • Collaborative Neuroscience Research, LLC โ€” Los Alamitos, California
  • Paradigm Clinical Research-Modesto โ€” Modesto, California
  • Paradigm Clinical Research Centers, LLC โ€” San Diego, California
  • University Clinical Investigators, Incorporated โ€” Tustin, California
  • Diablo Clinical Research, LLC dba Flourish Research โ€” Walnut Creek, California
  • AGA Clinical Trials โ€” Hialeah, Florida
  • Westside Center for Clinical Research โ€” Jacksonville, Florida
  • New Horizon Research Center โ€” Miami, Florida
  • Charter Research โ€” Orlando, Florida
  • Atlanta Diabetes Associates โ€” Atlanta, Georgia
  • Clinical Research Atlanta โ€” Stockbridge, Georgia
  • Koch Family Medicine Clinical Research/Elite Research Network โ€” Morton, Illinois
  • Bioluminux Clinical Research Illinois โ€” Naperville, Illinois
  • Johnson County Clinical Trials โ€” Lenexa, Kansas
  • DelRicht Research โ€” Mandeville, Louisiana
  • DelRicht Research โ€” Prairieville, Louisiana
  • Patient First Clinical Trials (PFCTRIALS) โ€” Lutherville, Maryland

๐Ÿ“ž Contact the Study Coordinator

Phone: (800) 718-1021

Email: ClinicalTrials.gov_Inquiries@pfizer.com

Coordinator details come directly from the registered NIH protocol. Confirm the study is still recruiting before traveling.

๐Ÿ’ฐ Cost, Insurance & Patient Rights

  • 100% Free Items: The investigational treatment and protocol-required procedures are supplied at zero cost by the sponsor.
  • Routine Patient Care: Under federal law (ACA ยง 2709) and many state statutes, routine care costs are covered during participation.
  • Voluntary Participation: You may withdraw at any time without affecting your standard medical care.

Explore by condition: All Overweight clinical trials

๐Ÿ’ก How to Participate

  1. Check the checklist above to see if you may qualify.
  2. Contact the study coordinator using the phone/email above.
  3. Ask about the visit schedule, what is covered at no cost, and any travel support.
  4. Confirm with your own doctor before making a decision.
๐Ÿ›๏ธ View Official NIH Record โ†—