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Completed

NCT Number: NCT07640867

RCI001 Eye Drops 0.25% in Healthy Adult Male Participants

This study is being conducted to evaluate the safety, tolerability, and pharmacokinetics of RCI001 eye drops 0.25% in healthy adult male participants. Pharmacokinetics means how the study drug is absorbed, distributed, and eliminated from the body over time.

Participants who meet the study requirements will be randomly assigned to receive either RCI001 eye drops 0.25% or placebo eye drops. The study treatment will be administered to the left eye according to the assigned dosing schedule. The study includes single-dose administration schedules and multiple-dose administration schedules for up to 15 days.

The study will monitor safety and tolerability through adverse event assessments, vital signs, physical examinations, electrocardiograms, laboratory tests, eye symptom assessments, and ophthalmic examinations. Blood samples will be collected at scheduled time points to measure the concentration of RCI001 in the blood.

Approximately 40 healthy adult male participants are planned to take part in this study.

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Key information

Age range

19 year–50 year

Sex eligibility

Male

Study type

Interventional

Phase

Phase 1

Primary location

Seoul national unversity hospital

Seoul, South Korea

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Healthy adult male volunteers aged 19 to 50 years at screening.
  • Body weight of 50.0 kg to 90.0 kg and body mass index (BMI) of 18.5 kg/m2 to 29.9 kg/m2 at screening.
  • Participants who have received sufficient explanation about the study, fully understand the study, voluntarily decide to participate, and provide written informed consent to comply with study requirements.
  • Participants who are considered eligible for this study by the investigator based on physical examination, clinical laboratory tests, medical interview, and other screening assessments.

Exclusion criteria

  • Participants with a current or past history of clinically significant disease in the hepatobiliary system, kidney, nervous system, immune system, respiratory system, gastrointestinal system, endocrine system, hematologic or oncologic system, cardiovascular system, urinary system, or psychiatric system, including but not limited to severe hepatic impairment, viral hepatitis, severe renal impairment, heart failure, Torsade de pointes, mood disorder, or obsessive-compulsive disorder.
  • Participation in another clinical trial, including a bioequivalence study, and administration of an investigational product within 6 months before the first planned administration of the investigational product.
  • Current smoker who cannot stop smoking during the study period. Participants who stopped smoking at least 3 months before the first planned administration of the investigational product may be eligible.
  • Consumption of grapefruit, grapefruit juice, or grapefruit-containing foods from 3 days before the first planned administration of the investigational product until the end of the study, or inability to abstain from grapefruit-containing foods and beverages during this period.
  • Participants who are considered unsuitable for participation in the study by the investigator for any other reason.

Treatment and study plan

RCI001 Eye Drops 0.25%

Drug

RCI001 eye drops 0.25% administered to the left eye according to the assigned dosing schedule.

Other names: RCI001

Placebo Eye Drops

Drug

Matching placebo eye drops administered to the left eye according to the assigned dosing schedule.

Other names: Matching placebo

Primary outcomes

  1. Number of Participants With Adverse Events

    Time frame: From informed consent through the post-study visit, up to Day 18 for single-administration cohorts and up to Day 32 for multiple-administration cohorts

    The number and percentage of participants with adverse events will be summarized by treatment group. Adverse events will be assessed for seriousness, severity, relationship to the study drug, action taken, outcome, and whether they are treatment-emergent adverse events.

  2. Number of Participants With Clinically Significant Abnormalities in Safety Assessments

    Time frame: From baseline through the post-study visit, up to Day 18 for single-administration cohorts and up to Day 32 for multiple-administration cohorts

    Safety assessments will include vital signs, physical examinations, 12-lead electrocardiograms, clinical laboratory tests, ocular symptom assessments, and ophthalmic examinations. Clinically significant abnormalities will be summarized by treatment group.

Secondary outcomes

  1. Time to Maximum Plasma Concentration (Tmax) of RCI001 After Single Administration

    Time frame: Predose on Day -1 through Day 11

    Tmax will be calculated from plasma RCI001 concentration-time data after single administration.

  2. Maximum Observed Plasma Concentration (Cmax) of RCI001 After Single Administration

    Time frame: Predose on Day -1 through Day 25

    Cmax will be calculated from plasma RCI001 concentration-time data after single administration.

  3. Area Under the Plasma Concentration-Time Curve From Time Zero to the Last Quantifiable Concentration (AUClast) of RCI001 After Single Administration

    Time frame: Predose on Day -1 through Day 11.

    AUClast will be calculated from plasma RCI001 concentration-time data after single administration.

  4. Area Under the Plasma Concentration-Time Curve From Time Zero to Infinity (AUCinf) of RCI001 After Single Administration

    Time frame: Predose on Day -1 through Day 11.

    AUCinf will be calculated from plasma RCI001 concentration-time data after single administration.

  5. Terminal Elimination Half-Life (t1/2) of RCI001 After Single Administration

    Time frame: Predose on Day -1 through Day 11.

    Terminal elimination half-life will be calculated from plasma RCI001 concentration-time data after single administration.

  6. Apparent Clearance (CL/F) of RCI001 After Single Administration

    Time frame: Predose on Day -1 through Day 11.

    CL/F will be calculated from plasma RCI001 concentration-time data after single administration.

  7. Apparent Volume of Distribution (Vz/F) of RCI001 After Single Administration

    Time frame: Predose on Day -1 through Day 11.

    Vz/F will be calculated from plasma RCI001 concentration-time data after single administration.

  8. Time to Maximum Plasma Concentration at Steady State (Tmax,ss) of RCI001 After Multiple Administration

    Time frame: Predose on Day -1 through Day 25.

    Tmax,ss will be calculated from plasma RCI001 concentration-time data after multiple administration.

  9. Maximum Observed Plasma Concentration at Steady State (Cmax,ss) of RCI001 After Multiple Administration

    Time frame: Predose on Day -1 through Day 25.

    Cmax,ss will be calculated from plasma RCI001 concentration-time data after multiple administration.

  10. Minimum Observed Plasma Concentration at Steady State (Cmin,ss) of RCI001 After Multiple Administration

    Time frame: Predose on Day -1 through Day 25.

    Cmin,ss will be calculated from plasma RCI001 concentration-time data after multiple administration.

  11. Average Plasma Concentration at Steady State (Cavg,ss) of RCI001 After Multiple Administration

    Time frame: Predose on Day -1 through Day 25.

    Cavg,ss will be calculated from plasma RCI001 concentration-time data after multiple administration.

  12. Trough Plasma Concentration (Ctrough) of RCI001 After Multiple Administration

    Time frame: Predose on Day -1 through Day 25.

    Ctrough will be calculated from plasma RCI001 concentration-time data after multiple administration.

  13. Area Under the Plasma Concentration-Time Curve Over the Dosing Interval at Steady State (AUCtau,ss) of RCI001 After Multiple Administration

    Time frame: Predose on Day -1 through Day 25.

    AUCtau,ss will be calculated from plasma RCI001 concentration-time data after multiple administration.

  14. Terminal Elimination Half-Life at Steady State (t1/2,ss) of RCI001 After Multiple Administration

    Time frame: Predose on Day -1 through Day 25.

    Terminal elimination half-life at steady state will be calculated from plasma RCI001 concentration-time data after multiple administration.

  15. Apparent Clearance at Steady State (CLss/F) of RCI001 After Multiple Administration

    Time frame: Predose on Day -1 through Day 25.

    CLss/F will be calculated from plasma RCI001 concentration-time data after multiple administration.

  16. Apparent Volume of Distribution at Steady State (Vz,ss/F) of RCI001 After Multiple Administration

    Time frame: Predose on Day -1 through Day 25.

    Vz,ss/F will be calculated from plasma RCI001 concentration-time data after multiple administration.

  17. Peak-to-Trough Fluctuation (PTF) of RCI001 After Multiple Administration

    Time frame: Predose on Day -1 through Day 25.

    PTF will be calculated from plasma RCI001 concentration-time data after multiple administration.

Sponsors and collaborators

Lead sponsor

Rudacure

Industry

Registry information

Official study title

A Randomized, Double-Blind, Placebo-Controlled, Single- and Multiple-Administration Phase 1 Clinical Trial to Investigate the Pharmacokinetics, Safety, and Tolerability of RCI001 Eye Drops 0.25% in Healthy Male Subjects

Important dates

Study start
2024
Primary completion
2025
Study completion
2025
First posted
Jun 11, 2026
Registry last updated
Jun 11, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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