Now enrolling adults with type 1 diabetes in a clinical trial for an investigational oral medication.
T1D Exchange is helping vTv Therapeutics find participants for their clinical trial evaluating a drug called cadisegliatin (also known as TTP399). TTP399 is an investigational oral medication that supports the liver’s ability to store glucose, which may help reduce the risk of hypoglycemia (low blood sugar) and lower A1C levels.
New study locations have been added across the U.S., making participation easier. If you live near one of the study site locations, you may now be eligible for this clinical trial, even if you were previously disqualified. Check out the site directory to see if there is a study site near you.
About the Investigational Drug
The study drug, called cadisegliatin, or TTP399, is an investigational medication for adults living with T1D. TTP399 is an oral medication designed to support the liver in more effectively storing glucose. This may help reduce the risk of hypoglycemia and lower your A1C.

T1D Exchange is not a sponsor and is not administering this clinical trial, nor are we implying that you will qualify. We are sharing this research opportunity with you so you can decide whether to seek more information or participate.
ELIGIBILITY CRITERIA
vTv Therapeutics is looking for individuals who:
- Are over the age of 18
- Have been living with T1D for at least 5 years
- Have an A1C below 9.5% at the start of participation in the clinical trial
- Have had at least one of the following in the past 2 months:
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A glucose or CGM value below 54 mg/dL
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A severe hypoglycemic event requiring help from another person.
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*The guidelines listed above are the primary eligibility criteria for this study. Only the clinical trial research staff can determine if you meet all eligibility criteria for this study.
See If You Qualify
Step 1: Complete a brief questionnaire to determine if you may be a good fit for this clinical trial. You will also be asked if you agree to have your contact information shared with the clinical trial staff.
Step 2: If your answers in the eligibility screener suggest you may qualify, clinical trial staff will contact you. They will ask follow-up questions to confirm your eligibility for this trial. They will also provide additional information about this research opportunity and, if you qualify, give you the option to enroll.
To protect your privacy, we will not share your contact information with the study staff unless you sign the Informed Consent Form at the beginning of the eligibility screener.
WHAT TO EXPECT IF YOU ENROLL IN THE CLINICAL TRIAL
Participants in this clinical trial will be assigned at random to one of three groups. Two groups will receive TTP399 at different dosages. One group will receive a placebo. You will not be told which of the three groups to which you have been assigned. All participants will receive insulin. Each group will take their assigned study medication for 26 weeks. Participants must take the assigned study drug twice daily at mealtimes. Participants will also be provided with a Dexcom G7 CGM to wear throughout the trial.
Your participation in the study is expected to last approximately 9 months and requires up to 11 in-person and 11 virtual visits.
The clinical trial research staff will communicate other requirements.
Qualified participants will receive payment for time and travel.

Questions about this Study?
DIRECTORY OF SITES BY STATE
Headlands Research California, LLC AMCR
- 625 West Citracado Parkway
- Suite 112
- Escondido, CA 92025
Scripps Whittier Institute for Diabetes
- 9898 Genesee Ave
- 6th Floor
- La Jolla, CA 92037
Denver Endocrinology Diabetes and Thyroid Center
- 799 E. Hampden Ave
- Suite 525
- Englewood, CO 80113
ALL Medical Research, LLC
- 9700 Stirling Road
- Suite 103
- Cooper City, FL 33024
Metabolic Research Institute, Inc.
- 1515 North Flagler Drive
- Suite 440
- West Palm Beach, FL 33401
Atlanta Diabetes Associates
- 1800 Howell Mill Road
- Suite 450
- Atlanta, GA 30318
East Coast Institute for Research – Canton
- 125 Oakside Court
- Suite 301
- Canton, GA 30114
Centricity Research – Columbus
- 2425 Brookstone Centre Parkway
- Columbus, GA 31904
The Jones Center Clinical Research
- 265 Sheraton Blvd
- Macon, GA 31210
Endocrine Research Solutions, Inc
- 1475 Holcomb Bridge Road
- Suite 129
- Roswell, GA 30076
Iowa Diabetes and Endocrinology Research Center
- 4201 Corporate Drive
- Suite 100
- West Des Moines, IA 50266
University of North Carolina at Chapel Hill
- 800 Eastowne Drive
- Suite 208
- Chapel Hill, NC 27514
Lucas Research, Inc.
- 623 North 35th Street
- Morehead City, NC 28557
Vector Clinical Trials – Reno
- Reno, NV 89511
- Suite 306
Jacobi Medical Center
- Jacobi Medical Center
- Bronx, NY 10461
Velocity Clinical Research – Medford
- 3121 Signature Court
- Medford, OR 97504
University of Pennsylvania
- 3400 Civic Center Blvd
- 11 South Room 11-102
- Philadelphia, PA 19104
Texas Diabetes and Endocrinology, P.A
- 6500 N. Mopac Expwy
- Bldg 3 Ste 200
- Austin, TX 78731
Velocity Clinical Research – Dallas
- 7777 Forest Lane
- Suite C-685
- Dallas, TX 75230
Southern Endocrinology Associates
- 1621 North Belt Line Road
- Suite A
- Mesquite, TX 75149
Diabetes & Glandular Disease Clinic
- 5107 Medical Drive
- Research Department
- San Antonio, TX 78229
Consano Clinical Research
- 4118 Pond Hill
- Bldg #300
- Shavano Park, TX 78231
University of Washington Medical Center
- 4225 Roosevelt Way NE
- Suite 101
- Seattle, WA 98105
About vTv Therapeutics

