Pharmacogenetics of Response to Sitagliptin (PRS)

Starting soon · Phase 4 · Has a placebo group

Conditions studied: Diabetes

In brief

This is a research study to find out how different people respond to a medication called sitagliptin. Sitagliptin is an FDA approved medication that is used to treat diabetes. We are asking for healthy, non-diabetic volunteers to participate in this 7-week study. If you agree to participate, you will take part in 2 clinic visits that are 4-6 weeks apart. At the clinic visits you will have an oral glucose tolerance test (OGTT) and other blood tests to see how your body processes glucose (sugar). An OGTT is a test in which your drink glucose and then blood samples are taken afterward at specific time points to measure glucose and insulin in your blood. Each clinic visit will last about 5 hours.

Key facts

Study ID: NCT06813014
Run by: University of Maryland, Baltimore
People needed: 400
Starts: 2026-12-01
Expected to finish: 2032-12-01
Last updated by the study team: 2026-02-18

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Age: \>18 years old
Members of Old Order Amish community in Lancaster, PA

You may not qualify if…

• Pregnancy (reproductive age women will undergo pregnancy tests immediately before receiving the drug)
Diabetes: HbA1c \> 6.5% or fasting plasma glucose \>126 mg/dL
Estimated glomerular filtration rates (eGFR) \<60 mL/min/1.73 m2
Anemia: hematocrit \< 35%
Thyroid status: TSH\<0.4 or TSH\>5.5
ALT or AST in excess of 2X upper limit of normal
Drugs that in the physician's judgment would alter response to sitagliptin
Significant health issues that in the physician's judgment could increase the risk for participants.

Where it is running

University of Maryland Amish Research Clinic — Lancaster, Pennsylvania, United States

Full record on ClinicalTrials.gov

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