Not DeterminedPhase 1NCT06493045
First-In-Human (FIH) Trial Evaluating the Safety and Tolerability of Single and Multiple Ascending Oral Doses of IRL757 in Healthy Volunteers
A Phase 1 study testing IRL757 in people with Not Determined, run by Integrative Research Laboratories AB at 1 site in Sweden.
Trial summary
This is a Phase 1, First-In-Human study evaluating the safety and tolerability of single and multiple ascending oral doses of IRL757 in healthy volunteers. Read more about this study
- Who is it for?
- Ages 18 to 55 yearsHealthy volunteers can take part
- Conditions the study is for
- Not Determined
- What is being tested?
- IRL757
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 82 participants
- Where
- 1 siteSweden
- Study dates
- 16 May 2024to 7 Feb 2025
- Phase
- Phase 1
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 55 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- Willing and able to give written informed consent for participation in the trial.
- Healthy male or female subject aged 18-55 years inclusive.
- Weight of at least 50 kg and no more than 110 kg at screening.
- Willing to use highly effective methods of contraception
Who cannot join
- History of any clinically significant disease or disorder which, in the opinion of the Investigator, may either put the subject at risk because of participation in the trial, or influence the results or the subject's ability to participate in the trial.
- History or present clinically significant psychiatric diagnosis, at discretion of the Investigator.
- Any suicidal ideation of type 4 or 5 in the C-SSRS in the past 3 months (i.e. active suicidal thought with intent but without specific plan, or active suicidal thought with plan and intent).
- History of seizures, including febrile seizure in childhood.
- Any clinically significant illness, medical/surgical procedure or trauma within four (4) weeks of the first administration of IMP.
- Any planned major surgery within the duration of the trial.
Show all 19Show fewer
- Any positive result on screening for serum hepatitis B surface antigen, hepatitis C antibody and Human Immunodeficiency Virus (HIV).
- After 10 minutes supine rest at the time of screening, any vital signs values outside the following ranges: Systolic blood pressure > 140 mm Hg, Diastolic blood pressure > 90 mm Hg, Heart rate < 40 or > 85 beats per minute.
- Prolonged QTcF (> 450 ms for male subjects or > 470 ms for female subjects), cardiac arrhythmias or any clinically significant abnormalities in the resting ECG at the time of screening, as judged by the Investigator.
- History of severe allergy/hypersensitivity or on-going allergy/hypersensitivity, as judged by the Investigator, or history of hypersensitivity to drugs with a similar chemical structure or class to IRL757.
- Use of any prescribed or non-prescribed medication including antacids, analgesics, herbal remedies, vitamins and minerals within two (2) weeks prior to the first administration of IMP, except occasional intake of paracetamol (maximum 2 000 mg/day; and not exceeding 3 000 mg/week), at the discretion of the Investigator.
- Administration of another new chemical entity (defined as a compound which has not been approved for marketing) or has participated in any other clinical trial that included drug treatment within three (3) months of the first administration of IMP in this trial. Subjects consented and screened but not dosed in previous phase I studies are not excluded.
- Current smokers or users of nicotine products. Irregular use of nicotine (e.g. smoking, snuffing, chewing tobacco) less than three (3) times per week is allowed before screening visit.
- History of alcohol abuse or excessive intake of alcohol, as judged by the Investigator.
- Positive screen for drugs of abuse at screening or on admission to the unit or positive screen for alcohol at screening or on admission to the unit prior to administration of the IMP.
- Use of anabolic steroids.
- Current excessive use of caffeine, as judged by the Investigator.
- Plasma donation within one (1) month of screening or any blood donation/blood loss > 450 mL during the three (3) months prior to screening.
- Investigator considers the subject unlikely to comply with trial procedures, restrictions and requirements.
Trial locations and contacts
1 site in 1 country.
Sweden1 site
CTC Clinical Trial Consultants AB, Uppsala University Hospital
Uppsala
About this study
Official title: A Prospective, Single-centre, Randomised, Double-blind, Placebo-controlled, Phase I, First-In-Human (FIH) Trial Evaluating the Safety and Tolerability of Single and Multiple Ascending Oral Doses of IRL757 in Healthy Volunteers
This is a Phase 1, First-In-Human study evaluating the safety and tolerability of single and multiple ascending oral doses of IRL757 in healthy volunteers.
Read the detailed description
The trial is composed of two parts: Single Ascending Dose (SAD) part and Multiple Ascending Dose (MAD) part.
The SAD part of the trial will be a parallel group design with one pre-defined starting dose and up to four tentative ascending dose levels of IRL757. Eligible and consenting participants will be included in one of five cohorts, with 8 participants in each cohort (ratio 1:3 placebo/IRL757).
The MAD part of the trial will start after completion of the SAD part of the trial. Depending on the data from the SAD part, two or three dose levels will be evaluated in the MAD part of the trial. There will be 12 participants in each cohort (ratio 1:3 placebo/IRL757).
At the screening visit, consenting subjects will be screened for eligibility according to study specific inclusion/exclusion criteria within 4 weeks before Investigational Medicinal Product (IMP) administration.
If eligible, participants will be admitted to the phase 1 clinic for allocation and administration of the IMP: single dose in the SAD part of the trial or repeated dose (treatment administered repeatedly for 10 days) in the MAD part of the trial. Participants will receive IRL757 or placebo, as randomized.
The treatment allocation will be double-blind, i.e. it will not be disclosed to the patients, the site staff or the Sponsor.
A follow-up visit will be performed for all participants, 5-10 days after IMP administration.
Safety assessments will be performed throughout the study: review and collection of adverse events, physical examination, suicidality ideation, electrocardiogram recording, vital signs, safety laboratory assessments. Blood and urine sampling will also be performed for determination of pharmacokinetic parameters.
- Conditions
- Not Determined
- Being tested
- IRL757, Placebo
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
IRL757Drug
IRL757 capsule
PlaceboDrug
Placebo capsule
| Study group | Role | What they receive |
|---|---|---|
| IRL757 | Experimental | Not described Receives: Drug: IRL757 |
| Placebo Comparator | Placebo comparator | Not described Receives: Drug: Placebo |
What is being measured
The primary outcome is the main question the study is designed to answer.
Evaluation of Frequency, Seriousness and Intensity of Adverse Events
Total number of AEs, and total number of AEs by severity and relationship to study treatment are presented. Refer to the Adverse Events section for more information
Measured: Until 5-10 days after IMP administration
Description of Physical Examination Findings
Number of participants with clinically significant abnormal findings on physical examination
Measured: Until 5-10 days after IMP administration
Description of Electrocardiogram Findings
Number of participants with clinically significant abnormal electrocardiogram findings
Measured: Until 5-10 days after IMP administration
Description of Vital Signs Findings
Number of participants with clinically significant abnormal vital signs findings
Measured: Until 5-10 days after IMP administration
Description of Safety Laboratory Measurements
Number of participants with clinically significant abnormal safety laboratory measurements
Measured: Until 5-10 days after IMP administration
Description of C-SSRS (Columbia Suicide Severity Rating Scale) Findings
Number of Participants With Suicidal Thoughts or Attempts
Measured: Until 5-10 days after IMP administration
Secondary outcomes (5)
Determination of Maximum Plasma Concentration [Cmax] of IRL757 and Its 3 Main Metabolites
Geometric mean and geometric coefficient of variation (CV%) for maximum plasma concentration. Data from Pharmacokinetic analysis set. All samples from all participants were subject to analysis of IRL757 and main metabolite concentrations.
Measured: Until 48 hours post-dose
Determination of the AUC of IRL757 and Its 3 Main Metabolites After Single and Multiple Dose
Geometric mean and geometric coefficient of variation (CV%) for area under the plasma concentration-time curve (AUC0-inf for SAD and AUC0-tau for MAD). Data from Pharmacokinetic analysis set. All samples from all participants were subject to analysis of IRL757 and main metabolite concentrations.
Measured: Until 48 hours post-dose
Determination of the Time for Maximum Concentration [Tmax] of IRL757 and Its 3 Main Metabolites
Median time to maximum plasma concentration with full range (minimum, maximum). Data from Pharmacokinetic analysis set. All samples from all participants were subject to analysis of IRL757 and main metabolite concentrations.
Measured: Until 48 hours post-dose
Determination of the Half-life [t1/2] of IRL757 and Its 3 Main Metabolites
Geometric mean and geometric coefficient of variation (CV%) for terminal elimination half-life. Data from Pharmacokinetic analysis set. All samples from all participants were subject to analysis of IRL757 and main metabolite concentrations.
Measured: Until 48 hours post-dose
Determination of the Renal Clearance (CLr) of IRL757
Geometric mean and geometric coefficient of variation (CV%) for renal clearance. Data from Pharmacokinetic analysis set. All samples from all participants were subject to analysis of IRL757 and main metabolite concentrations.
Measured: Until 48 hours post-dose
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted9 Jul 2024
- Study start16 May 2024
- Primary completion7 Feb 2025
- Study completion7 Feb 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for Not DeterminedStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 1
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Model description
- Ascending doses
- Masking
- Double blind
- Who is masked
- Participant, Investigator
- Enrolment
- 82 participants (actual)
Sponsor and investigators
- Lead sponsor
- Integrative Research Laboratories AB
- Sponsor type
- Industry (pharma, biotech, devices)
- Collaborators
- Michael J. Fox Foundation for Parkinson's Research
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06493045
- Sponsor's protocol ID
- IRL757C001
- Status last verified
- Apr 2026
- First submitted
- 29 May 2024
- Last updated
- 15 May 2026
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 15 May 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Prospective, Single-centre, Randomised, Double-blind, Placebo-controlled, Phase I, First-In-Human (FIH) Trial Evaluating the Safety and Tolerability of Single and Multiple Ascending Oral Doses of IRL757 in Healthy Volunteers
- ClinicalTrials.gov ID
- NCT06493045
- Acronym / sponsor ID
- IRL757C001
- Conditions
- Not Determined
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 82 participants (actual)
- Lead sponsor
- Integrative Research Laboratories ABIndustry (pharma, biotech, devices)
- Collaborators
- Michael J. Fox Foundation for Parkinson's Research
- Study start
- 16 May 2024 (actual)
- Primary completion
- 7 Feb 2025 (actual)
- Study completion
- 7 Feb 2025 (actual)
- First posted
- 9 Jul 2024 (actual)
- Results
- Posted 15 May 2026
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This is a Phase 1, First-In-Human study evaluating the safety and tolerability of single and multiple ascending oral doses of IRL757 in healthy volunteers.
Detailed description
The trial is composed of two parts: Single Ascending Dose (SAD) part and Multiple Ascending Dose (MAD) part.
The SAD part of the trial will be a parallel group design with one pre-defined starting dose and up to four tentative ascending dose levels of IRL757. Eligible and consenting participants will be included in one of five cohorts, with 8 participants in each cohort (ratio 1:3 placebo/IRL757).
The MAD part of the trial will start after completion of the SAD part of the trial. Depending on the data from the SAD part, two or three dose levels will be evaluated in the MAD part of the trial. There will be 12 participants in each cohort (ratio 1:3 placebo/IRL757).
At the screening visit, consenting subjects will be screened for eligibility according to study specific inclusion/exclusion criteria within 4 weeks before Investigational Medicinal Product (IMP) administration.
If eligible, participants will be admitted to the phase 1 clinic for allocation and administration of the IMP: single dose in the SAD part of the trial or repeated dose (treatment administered repeatedly for 10 days) in the MAD part of the trial. Participants will receive IRL757 or placebo, as randomized.
The treatment allocation will be double-blind, i.e. it will not be disclosed to the patients, the site staff or the Sponsor.
A follow-up visit will be performed for all participants, 5-10 days after IMP administration.
Safety assessments will be performed throughout the study: review and collection of adverse events, physical examination, suicidality ideation, electrocardiogram recording, vital signs, safety laboratory assessments. Blood and urine sampling will also be performed for determination of pharmacokinetic parameters.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, investigator)
- Number of arms
- 2
- Model description
- Ascending doses
| Arm | Type | Receives |
|---|---|---|
| IRL757 | Experimental | Drug: IRL757 |
| Placebo Comparator | Placebo comparator | Drug: Placebo |
Who may qualify
- Ages
- 18 to 55 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (4 listed)
- Willing and able to give written informed consent for participation in the trial.
- Healthy male or female subject aged 18-55 years inclusive.
- Weight of at least 50 kg and no more than 110 kg at screening.
- Willing to use highly effective methods of contraception
Key exclusion criteria (19 listed)
- History of any clinically significant disease or disorder which, in the opinion of the Investigator, may either put the subject at risk because of participation in the trial, or influence the results or the subject's ability to participate in the trial.
- History or present clinically significant psychiatric diagnosis, at discretion of the Investigator.
- Any suicidal ideation of type 4 or 5 in the C-SSRS in the past 3 months (i.e. active suicidal thought with intent but without specific plan, or active suicidal thought with plan and intent).
- History of seizures, including febrile seizure in childhood.
- Any clinically significant illness, medical/surgical procedure or trauma within four (4) weeks of the first administration of IMP.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| IRL757IRL757 capsule | Drug | IRL757 |
| PlaceboPlacebo capsule | Drug | Placebo Comparator |
Primary outcome
Evaluation of Frequency, Seriousness and Intensity of Adverse Events
Time frame: Until 5-10 days after IMP administration
Total number of AEs, and total number of AEs by severity and relationship to study treatment are presented. Refer to the Adverse Events section for more information
Description of Physical Examination Findings
Time frame: Until 5-10 days after IMP administration
Number of participants with clinically significant abnormal findings on physical examination
Description of Electrocardiogram Findings
Time frame: Until 5-10 days after IMP administration
Number of participants with clinically significant abnormal electrocardiogram findings
Description of Vital Signs Findings
Time frame: Until 5-10 days after IMP administration
Number of participants with clinically significant abnormal vital signs findings
Description of Safety Laboratory Measurements
Time frame: Until 5-10 days after IMP administration
Number of participants with clinically significant abnormal safety laboratory measurements
Description of C-SSRS (Columbia Suicide Severity Rating Scale) Findings
Time frame: Until 5-10 days after IMP administration
Number of Participants With Suicidal Thoughts or Attempts
5 secondary outcomes
Determination of Maximum Plasma Concentration [Cmax] of IRL757 and Its 3 Main Metabolites
Time frame: Until 48 hours post-dose
Determination of the AUC of IRL757 and Its 3 Main Metabolites After Single and Multiple Dose
Time frame: Until 48 hours post-dose
Determination of the Time for Maximum Concentration [Tmax] of IRL757 and Its 3 Main Metabolites
Time frame: Until 48 hours post-dose
Determination of the Half-life [t1/2] of IRL757 and Its 3 Main Metabolites
Time frame: Until 48 hours post-dose
Determination of the Renal Clearance (CLr) of IRL757
Time frame: Until 48 hours post-dose
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 15 May 2026.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing IRL757 in people with Not Determined, run by Integrative Research Laboratories AB at 1 site in Sweden.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 19 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 15 May 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Sweden. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 15 May 2026). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Evaluation of Frequency, Seriousness and Intensity of Adverse Events (time frame: Until 5-10 days after IMP administration). The study lists 6 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 15 May 2026.