Clinical trial Recruiting at 1 site Phase 1 Interventional Ages 18 to 55

KT-621: trying different oral forms to see if they work safely in healthy adults

Official title: A Phase 1, Open-Label, Crossover Study to Evaluate the Relative Bioavailability of Different Oral Formulations of KT-621 in Healthy Adult Participants

Run by Kymera Therapeutics, Inc. · NCT07823205 · Data updated 2026-11-12

This Phase 1 study tests different oral forms of KT-621 to see how well they are absorbed and how safe and tolerable they are in healthy adults.

More Healthy Adult Participants trials

Quick facts

PhasePhase 1
Study typeInterventional
Ages18 Years to 55 Years
SexAll
Enrollment54 (estimated)
SponsorKymera Therapeutics, Inc.
Industry-sponsored
Locations1 site (Lincoln, Nebraska)
StatusRecruiting
StartedOctober 5, 2026
Main results expectedApril 2027
Study endsMay 2027
Registry record updatedOctober 30, 2026
Trial IDNCT07823205 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Healthy adults weighing at least 50 kg (males) or 40 kg (females) with BMI 18.0–32.0 kg/m² who can provide informed consent and comply with study procedures.

Probably not a fit

Participants in whom safety concerns arise or who do not show favorable pharmacokinetic profiles may not receive direct benefit.

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

What this trial studies

This is a first-in-human study in healthy volunteers to compare the relative bioavailability of several KT-621 oral formulations. Participants will receive different KT-621 formulations in a controlled setting with careful monitoring for safety and laboratory changes. The trial will analyze pharmacokinetic data and adverse events to determine which formulation provides favorable exposure with acceptable tolerability. The study is sponsored by Kymera Therapeutics and conducted at a single site in Lincoln, Nebraska.

Why it matters

Potential benefit: If successful, the best formulation could advance KT-621 development and inform dosing strategies for future studies.

How similar studies have gone: Similar early-formulation studies are common in drug development and help identify feasible, safe formulations before patient studies.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Participants with a weight of at least 50 kilograms (kg) if male or 40 kg if female, and a body mass index (BMI) between 18.0 and 32.0 kg/m² (inclusive) at Screening.
* Participants must be willing and able to read, understand, and sign an informed consent form (ICF) which includes compliance with requirements and restrictions listed in the ICF and in this protocol.
* Participants must be willing and able to comply with scheduled visits, treatment plan, laboratory tests, and other study procedures.

Exclusion Criteria:

* Participants who have a clinically relevant history of respiratory, gastrointestinal (GI), renal, hepatic, hematological, lymphatic, endocrinological, neurological, cardiovascular, psychiatric, musculoskeletal, genitourinary, immunological, dermatological, ophthalmological, or connective tissue diseases or disorders.
* Participants who have a clinically relevant surgical history (for example, surgery of the GI tract that could interfere with the PK of the study medication). Note: prior appendectomy or cholecystectomy is not exclusionary.
* Participants who have any known factor, condition, or disease that might interfere with treatment compliance, study conduct or interpretation of the results such as drug or alcohol dependence or psychiatric disease.
* Participants who have acute GI symptoms at the time of Screening or admission to the CRU (for example, nausea, vomiting, diarrhea, heartburn).
* Participants whose results from clinical laboratory safety tests are outside the local reference range at Screening or on admission to the CRU.
* Participants who have been dosed with any investigational drug or device in a clinical study within 30 days or 5 half-lives, or time determined by local requirements (whichever is longer) prior to admission to the CRU.
* Male participants who do not agree to refrain from sperm donation from admission to the CRU to 90 days after the last dose of KT-621.
* Male participants (and their partners of childbearing potential) and female participants who do not agree to the contraception requirements as specified in the clinical protocol.
* Female participants who are pregnant, lactating, or breastfeeding, or plan to become pregnant during study participation or within 30 days of the last dose of KT-621.
* Female participants with a positive or undetermined pregnancy result at the Screening visit or at admission to the CRU.

Where it's running

  • Celerion
    Lincoln, Nebraska, United States
    Recruiting

Study contacts

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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.