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Clinical Research Directory

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235 clinical studies listed.

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Healthy Participants

Tundra lists 235 Healthy Participants clinical trials. Each listing includes eligibility criteria, study locations, and direct links to research sites in the Tundra directory.

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COMPLETED

NCT07520474

Foam Rolling and Blood Pressure

Foam rolling (FR) has emerged as a widely adopted modality among rehabilitation practitioners and physically active populations. Previous investigations on FR have reported improvements in joint range of motion, small to trivial enhancements in selected performance measures, attenuation of exercise-induced muscle soreness, and reductions in pain perception. While the evidence base supporting range-of-motion, performance, muscle soreness and pain sensitivity adaptations is relatively well developed, considerably less attention has been directed toward the blood pressure responses to FR and the potential underlying mechanisms. Consequently, the physiological impact of FR on cardiovascular regulation in healthy, normotensive young adults remains insufficiently characterized and requires further systematic investigation. An acute reduction in blood pressure may be postulated, potentially mediated by mechanisms involving changes in total peripheral resistance, which could be linked to modifications in tissue mechanical characteristics. In parallel, a contributory role of autonomic regulation cannot be excluded, as shifts in sympathetic and parasympathetic activity may also influence cardiovascular responses.

Gender: All

Ages: 18 Years - Any

Updated: 2026-10-16

1 state

Healthy Young Adults
Healthy Adult Participants
Healthy Participants
+1
RECRUITING

NCT07093580

Study of S-892216 Long-acting Injectable (LAI) in Healthy Adult Participants

The purpose of this study is to investigate the safety, tolerability, and pharmacokinetics (PK) of single- and multiple-dose administration of S-892216-LAI in healthy adults.

Gender: All

Ages: 18 Years - 55 Years

Updated: 2026-10-16

3 states

Healthy Participants
ACTIVE NOT RECRUITING

NCT07300085

A Trial to Evaluate the Effect of CD388/MK1406 on the Immunogenicity of Fluzone® HD Vaccine (CD388.SQ.1.08/MK-1406-007)

Approximately one billion cases of seasonal influenza occur annually. Of these, 3 to 5 million illnesses are severe and responsible for up to 650,000 deaths per year (WHO 2025). Yearly administration of an influenza vaccine for the prevention of influenza is currently recommended. However, the real-world vaccine effectiveness varied from 10% to 60% in the general population across the years of 2004 to 2024, with effectiveness in most years below 50% (CDC 2025) and decreasing to as low as 5% in immunocompromised individuals (Hughes 2021). Researchers are looking for other ways to prevent severe illness from the influenza virus. The goals of this study are to learn if: * MK-1406 (formerly CD388) is safe to take with Fluzone® * MK-1406 affects the immune response to Fluzone®

Gender: All

Ages: 18 Years - 49 Years

Updated: 2026-10-16

2 states

Healthy Participants
NOT YET RECRUITING

NCT07801066

Testing Healthy Participants for Drowsiness After Single Dosing of Two Different Doses of Muscle Relaxer

Health participants take a single dose, perform testing, washout for one week, take a single dose of different formulation, and perform testing for comparison of the 2 doses.

Gender: All

Ages: 18 Years - 55 Years

Updated: 2026-10-16

1 state

Healthy Participants
COMPLETED

NCT07220954

A Study to Assess the Relative Bioavailability of Different Subcutaneous Formulations ofAZD6234

This study in healthy volunteers aims to compare blood levels and side effects after administration of different formulations of AZD6234. This study will take place at one site in Nottingham, United Kingdom, and will enrol 21 healthy men and women aged 18-55 years.

Gender: All

Ages: 18 Years - 55 Years

Updated: 2026-10-15

Healthy Participants
NOT YET RECRUITING

NCT07864311

A Phase 1 Study of VELA-101 in Adult Participants

This is a first-in-human (FIH), multicenter, randomized, double-blind, placebo-controlled study evaluating the safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD) of VELA-101, following single-ascending doses via subcutaneous (SC) administration.

Gender: All

Ages: 18 Years - 65 Years

Updated: 2026-10-15

2 states

Healthy Participants
Hyperlipidemia
ACTIVE NOT RECRUITING

NCT07800429

Effect of a Known P-glycoprotein (P-gp) Inhibitor, Itraconazole, on the Pharmacokinetics (PK) of Engasertib

The primary objective of this trial is to assess the effect of a known P-gp inhibitor, itraconazole, on the PK of engasertib in healthy adult participants.

Gender: All

Ages: 18 Years - 55 Years

Updated: 2026-10-15

Healthy Participants
COMPLETED

NCT07539090

Evaluate the Effect of Vimseltinib on Pharmacokinetics of Combined Oral Contraceptive (Ethinyl Estradiol/Levonorgestrel)

The main purpose of this study is to determine the effect of vimseltinib on pharmacokinetics of combined oral contraceptive (COC) (ethinyl estradiol/levonorgestrel) in healthy female participants. This study will last approximately 35 days.

Gender: FEMALE

Ages: 18 Years - 55 Years

Updated: 2026-10-15

1 state

Healthy Participants
ACTIVE NOT RECRUITING

NCT07814404

A Study to Assess the Mass Balance, Pharmacokinetics, and Metabolite Profiles of a Single Oral Dose of [14C]-INCB161734 in Healthy Male Participants

This study is conducted to assess the mass balance, pharmacokinetics, and metabolite profiles of a single oral dose of \[14C\]-INCB161734 in healthy male participants.

Gender: MALE

Ages: 19 Years - 55 Years

Updated: 2026-10-14

1 state

Healthy Participants
RECRUITING

NCT07775261

A Trial of Lu AH69593 in Healthy Participants

This trial will evaluate the effects of itraconazole (Part A) and, carbamazepine (Part B) on Lu AH69593, and the effect of Lu AH69593 on midazolam (Part C) in adult healthy participants. The main goals of this trial are to learn about 1. the effect of other medicines on Lu AH69593 2. the pharmacokinetic parameters of Lu AH69593 (how the drug is absorbed, distributed, and processed by the body), and 3. the safety and tolerability of Lu AH69593.

Gender: All

Ages: 18 Years - 55 Years

Updated: 2026-10-14

1 state

Healthy Participants
ACTIVE NOT RECRUITING

NCT07709494

A Phase 1a/1b Study to Investigate the Safety, Tolerability, Microbiological Response, and Pharmacokinetics of Inhaled Rev-56 in Adult Healthy Volunteers and Adult Non-cystic Fibrosis Bronchiectasis (NCFB) Patients With Chronic P. Aeruginosa

This is a Phase 1a/1b study to test the safety, tolerability, microbiological response, and pharmacokinetics of inhaled Rev-56 compared to placebo in adult healthy participants and non-cystic fibrosis bronchiectasis (NCFB) patients with P. aeruginosa, respectively. Phase 1a (Part A) will evaluate single doses of inhaled Rev-56 in adult healthy participants and includes up to 5 cohorts. Eligible participants will be randomized to active treatment or placebo in a 3:1 randomization scheme. Phase 1b (Part B) will evaluate the safety, tolerability, microbiological response, and pharmacokinetics of multiple doses of inhaled Rev-56 in NCFB patients with P. aeruginosa and includes 2 cohorts evaluating once daily dosing and twice daily dosing, respectively. Eligible participants will be randomized to active treatment or placebo in a 2:1 randomization scheme.

Gender: All

Ages: 18 Years - 80 Years

Updated: 2026-10-14

1 state

Healthy Participants
Non-cystic Fibrosis Bronchiectasis
RECRUITING

NCT07290283

A Study to Investigate Safety, Tolerability, and Pharmacokinetics of AZD3974 in Healthy Participants

The purpose of this study is to assess the safety and tolerability of AZD3974 and characterize the pharmacokinetics (PK) of AZD3974 following oral administration to healthy participants, including participants of Japanese and Chinese descent.

Gender: All

Ages: 18 Years - 55 Years

Updated: 2026-10-13

2 states

Healthy Participants
RECRUITING

NCT07782593

Satiety, Microbiome, Appetite Regulation, and Tracking Energy Across Targeted Snacks: Chronic Study

The goal of this clinical trial is to learn how eating different snack foods affects long term hunger and gut health in healthy adults. The study will be conducted remotely over 7 weeks. The main questions it aims to answer are: 1. Does eating a snack bar intervention for 5-weeks change how hungry participants feel throughout the day compared to a control? 2. Does eating a snack bar intervention change gut microbiome, bowel habits, digestive symptoms, and other health measures compared to a control over 5 weeks? Researchers will compare an intervention snack bar to a control snack bar to see if the intervention improves hunger, gut microbiome, digestive symptoms and other health measures. Participants will: * Eat 2 snack bars in place of their usual snacks every day for 4 weeks * Complete health measurements at the start and end of the study: a health questionnaire, 3-day food diary, 3-day hunger \& satiety survey, body measurements, and a stool sample * Fill out a short online survey (under 5 minutes) once a week

Gender: All

Ages: 35 Years - 65 Years

Updated: 2026-10-13

Healthy Participants
Healthy Adult Subject
Healthy Subjects
+2
RECRUITING

NCT07660731

A Study to Learn How Different Amounts of the Study Medicine Called PF-08103402 Are Tolerated and Act in the Body in Healthy Adults or Adults With Mild To-moderate Asthma

The purpose of this study is to learn about the safety of a new study medicine called PF-08103402 in healthy adults (do not have disease) and or in adults with mild-to-moderate asthma. This is the first time the study medicine is being given to people. For Parts A, B, C, D and F, the study is seeking participants who: * Are healthy (do not have disease) males or females who can no longer have children, * Are 18 to 65 years old, * Have a body mass index (BMI) of 16 to 32 kilograms per meter squared and a body weight of more than 50 kilograms (110 pounds). Body mass index is a way to measure body fat by using a person's height and weight For Part A (optional group or cohort 3: Japanese participants only): * A body weight of more than 45 kilograms (100 pounds). * Have 4 biological Japanese grandparents who were born in Japan. For Part E only: * Adults with a documented history of asthma (confirmed by a doctor) for at least 12 months before entering the study. * Have a body mass index (BMI) of 16 to 35 kilograms per meter squared and a total body weight of more than 50 kilograms (110 pounds). The study has six parts: Part A, Part B, Part C, Part D, Part E and Part F. The study medicine will be taken as a suspension or tablet by mouth 1 time a day (except in Parts B and E where it will be taken 1 time a day for 14 days) at the study clinic. The study will help understand: * how the body processes the study medicine in healthy participants (Parts A and B), * how much of the study medicine gets into the bloodstream and if food affects the amount of study medicine in the blood in healthy participants (Part C), * how the study medicine is broken down and leaves the body in healthy participants (Optional Part D), * how the study medicine is processed in adults with mild-to-moderate asthma (Optional Part E), * if taking the study medicine together with another medicine affects how each medicine is processed by the body in healthy participants (Optional Part F). Participants will take part in the study for about 10 weeks (Parts A and F), 12 weeks (Part B), 9 weeks (Parts C and D), and 16 weeks (Part E). During this time, they will have 2 study visits at the study clinic and up to 28 overnight stays (Part A), 18 overnight stays (Parts B and E), 10 overnight stays (Part C), 11 overnight stays (Part D), and 16 overnight stays (Part F). The study team will also call participants 1 time over the phone at the end of the study to assess how they are doing. Study measurements will be taken by body examination, monitoring side effects, blood and urine tests, heart tests (ECG), vital signs (blood pressure, pulse and respiratory rate), questionnaires (Parts C and E), stool samples (Part D only), and breathing tests (Part E only).

Gender: All

Ages: 18 Years - 65 Years

Updated: 2026-10-13

1 state

Healthy Volunteer Study
Healthy Adults
Healthy Participants
+1
RECRUITING

NCT07811999

Comparing the Extent to Which Romosozumab (AMG 785) is Made Available in the Body When Administered as a Single SC Injection or as 2 SC Injections

The primary objective of this trial is to evaluate the relative bioavailability of romosozumab administered as a single 2.34 mL subcutaneous (SC) injection from a prefilled syringe (PFS) or 2 x 1.17 mL SC injections from PFS in healthy participants.

Gender: All

Ages: 18 Years - 60 Years

Updated: 2026-10-13

2 states

Healthy Participants
RECRUITING

NCT07511205

A Study to Investigate Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of AZD1043 in Healthy Adult Participants Living With Overweight and/or Obesity.

The purpose of the study is to assess the safety, tolerability, pharmacokinetics (PK) and pharmacodynamics (PD) of AZD1043 following single and multiple ascending doses in healthy adult participants living with overweight and/or obesity, including participants of Japanese and Chinese descent.

Gender: All

Ages: 18 Years - 65 Years

Updated: 2026-10-13

2 states

Healthy Participants
Obesity
ACTIVE NOT RECRUITING

NCT07013643

A Study to Investigate the Effect of AZD6234, AZD9550, and a Combination of AZD9550 and AZD6234 on Pharmacokinetics of Combined Oral Contraceptive Ethinyl Estradiol/Levonorgestrel in Healthy Female Participants Living With Overweight or Obesity

This study will measure the effects of multiple doses of AZD6234, AZD9550 and a combination of AZD9550 and AZD6234 given as injection(s) on pharmacokinetics (PK) of combined oral contraceptive (CoC) ethinyl estradiol (EE)/levonorgestrel (LEVO) in healthy female participants with obesity.

Gender: FEMALE

Ages: 35 Years - 75 Years

Updated: 2026-10-13

2 states

Healthy Participants
RECRUITING

NCT07819097

A Study to Learn About the Safety and Immune Responses of RSVpreF in Older Adults

The purpose of this study is to learn about the safety, tolerability, and immune response of the RSVpreF vaccine in healthy older adults. Participants will take part in this study for about 6 months. The study will include people in China and the United States. In China, participants will receive either RSVpreF or placebo. A placebo is a dummy vaccine with no active ingredient, but it looks just like the vaccine being studied. In the United States, all participants will receive RSVpreF. Researchers will check for any reactions. They will also check blood test results to learn how the body responds to the vaccine. The main questions the study aims to answer are: * What local reactions and systemic events (body-wide symptoms) do participants have after a RSVpreF vaccination? * What medical problems do participants have after a RSVpreF vaccination? * Researchers will compare antibody levels from blood tests between the China cohort and the US cohort. An antibody is a substance in the body that try to fight off an infection or foreign substance. Participants will: * Have a screening visit to make sure they qualify for the study (participants in China will have this visit before the day of vaccination) * Receive the RSVpreF vaccination (or a placebo injection if in the China cohort) once at Visit 1. * Have a telephone or clinic visit 1 week later to assess local reactions and systemic events. * Have a clinic visit a month after vaccination for a checkup and tests. * Have a telephone or clinic visit 6 months after vaccination for a health check. * Have a blood test at screening (if in the China cohort only), on the day of vaccination and 1 month after vaccination.

Gender: All

Ages: 60 Years - Any

Updated: 2026-10-09

12 states

Adult
Healthy Participants
COMPLETED

NCT07588139

A Study to Evaluate Dermal Open-Flow Microperfusion and Plasma Pharmacokinetic Study of Multiple Doses of Oral Povorcitinib or Topical Ruxolitinib Cream in Healthy Adult Participants

The purpose of this study is to evaluate the interstitial concentrations using the open-flow microperfusion device and plasma pharmacokinetics following multiple doses of povorcitinib or topical ruxolitinib cream in healthy adult participants.

Gender: All

Ages: 18 Years - 65 Years

Updated: 2026-10-09

1 state

Healthy Participants
COMPLETED

NCT06356948

Rate of Tranexamic Acid Administration on Blood Pressure (RateTXA) Study.

Tranexamic acid is a well-established treatment for post-partum hemorrhage. This study aims to examine the effect of tranexamic acid administration rates on blood pressure changes over 1 minute compared to 10 minutes in healthy pregnant patients scheduled for cesarean delivery.

Gender: FEMALE

Ages: 19 Years - Any

Updated: 2026-10-08

1 state

Healthy Participants
RECRUITING

NCT07776418

Satiety, Microbiome, Appetite Regulation, and Tracking Energy Across Targeted Snacks: Acute Postprandial Study

The goal of this clinical trial is to learn how eating different snack foods affects acute hunger, energy intake and eating behaviour in healthy adults. The study will be conducted remotely over 5 days. The main questions it aims to answer are: 1. Does eating a snack bar intervention change how hungry participants feel later in the same day? 2. Does eating a snack bar intervention change participants' energy intake, nutrient intake and eating behaviour on the same day? 3. Does eating a snack bar intervention change participants mood, energy levels and alertness later in the same day? Researchers will compare an intervention snack bar to a control snack bar to see if the intervention improves hunger, energy intake, eating behaviour, and other subjective measures. Participants will: * Eat 2 snack bars for breakfast on 2 separate days, with 2 days in between * Not eat anything after 9pm the night before each test day * Fill out short online surveys (under 5 minutes) before breakfast and at set times over the next 3 hours * Not eat for 3 hours after breakfast * Write down everything they eat that day

Gender: All

Ages: 35 Years - 65 Years

Updated: 2026-10-07

Healthy Participants
Healthy Adult Subject
Healthy Subjects
+2
RECRUITING

NCT07320209

Physiological and Neurocognitive Responses to Multisensory Food Cues in VR

This study aims to investigate how food cravings change when visual food cues are enriched with sound, smell, and interactive experiences in a virtual reality (VR) environment. A total of 34 healthy Marmara University students aged 18 and older will participate in the study between November 2025 and March 2026, with a possible extension until September 2026. Participants will be exposed to real, virtual, and multisensory food cues, and their food craving levels, saliva composition, blood glucose, EEG activity, and body temperature will be measured. Salivary alpha-amylase will be analysed as a biomarker of physiological arousal during food cue exposure. The study aims to compare how virtual food cues affect food craving and physiological responses compared to real food cues. Findings are expected to contribute to understanding eating behaviour, developing VR-based interventions for healthy nutrition, and encouraging interdisciplinary collaboration between nutrition and engineering fields.

Gender: All

Ages: 18 Years - Any

Updated: 2026-10-07

1 state

Healthy Participants
RECRUITING

NCT07544628

A Phase 1 Study of Navlimetostat Tablet Formulations

This study aims to compare the PK of Navlimetostat after administration of a wet-granulation tablet versus the dry-granulation tablet formulation in healthy adult female

Gender: FEMALE

Ages: 18 Years - 55 Years

Updated: 2026-10-07

2 states

Healthy Participants
RECRUITING

NCT07626515

A Study to Evaluate Safety, Tolerability, and Pharmacokinetics of Enicepatide in Generally Healthy Adult Chinese Participants

This is a Phase I, randomized, double-blinded, placebo-controlled, study to assess the safety, tolerability, and pharmacokinetics (PK) of enicepatide in generally healthy adult Chinese participants with body mass index (BMI) ≥23.0 kilograms per meter squared (kg/m\^2).

Gender: All

Ages: 18 Years - 65 Years

Updated: 2026-10-06

Healthy Participants