Phase 2a Trial to Investigate the Efficacy of LIB-01 in Treatment of Erectile Dysfunction

A Phase 2a, Randomised, Double-blind, Parallel and Placebo-controlled Trial Investigating Safety and Efficacy of LIB-01 in Treatment of Erectile Dysfunction

The goal of this clinical trial is to learn if the drug LIB-01 works to treat erectile dysfunction in male adults. It will also learn about the safety of the drug LIB-01. The main questions it aims to answer are:

• Does the drug LIB-01 improve erectile function in males with erectile dysfunction?
• What medical problems do participants have when taking the drug LIB-01? Researchers will compare the drug LIB-01 to a placebo (a look-alike substance that contains no drug) to see if the drug LIB-01 works to treat erectile dysfunction.

Participants will:

• Take the drug LIB-01 or a placebo every day for 3 days
• Visit the clinic every week for 4 weeks, and at 8 weeks, for checkups and tests

Study Overview

• Status: Completed
• Conditions: Erectile Dysfunction
• Intervention / Treatment: Drug: LIB-01; Drug: LIB-01 Placebo

• Study Type: Interventional
• Enrollment (Actual): 156
• Phase: Phase 2

Contacts and Locations

Study Locations

• Denmark
  • Herlev, Denmark, 2730
    • Herlev Hospital
• Netherlands
  • Groningen, Netherlands, 9713 GZ
    • Clinical Trial Consultants
• Sweden
  • Linköping, Sweden, 582 13
    • Clinical Trial Consultants
  • Uppsala, Sweden, 75237
    • Clinical Trial Consultants
  • Göteborg
    • Mölndal, Göteborg, Sweden, 431 53
      • Clinical Trial Consultants
  • Stockholm
    • Solna, Stockholm, Sweden, 171 64
      • Clinical Trial Consultants

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Provision of signed and dated written informed consent prior to any trial specific procedures.
2. Male participant aged 25 to 65 years, inclusive, at the screening visit.
3. In a stable heterosexual relationship for at least 6 months prior to the screening visit.
4. Total score of 11-25 on questions 1-5 and 15 on the EF domain of the IIEF questionnaire.
5. Highly motivated to obtain treatment for ED.
6. Willing to abstain from unprotected sex and use condom to prevent drug exposure of a partner and pregnancy from first dose until the end-of-trial. In addition, refrain from donating sperm from the date of dosing until 3 months after (last) dosing with the IMP. Any female partner of child-bearing potential of a non-vasectomised trial participant must use contraceptive methods with a failure rate of < 1% to prevent pregnancy until the end-of-trial visit.
7. Understands the trial requirements.

Exclusion Criteria:

1. History of any clinically significant disease or disorder, including psychiatric disorder, which, in the opinion of the Investigator, may either put the participant at risk because of participation in the trial, or influence the results or the participant's ability to participate in the trial.
2. Type 1 diabetes.
3. Haemoglobin A1c (HbA1c) ≥48 mmol/L (6.5%).
4. Any clinically significant illness, medical/surgical procedure or trauma within 4 weeks of the first administration of IMP.
5. Malignancy within the past 5 years, with the exception of in situ removal of basal cell carcinoma.
6. Any planned major surgery within the duration of the trial.
7. History of severe allergy/hypersensitivity or ongoing allergy/hypersensitivity, as judged by the Investigator, or history of hypersensitivity to drugs with a similar chemical structure or class to LIB-01 API.
8. History of priapism, or increased risk due to underlying illness, including but not limited to hemoglobinopathies such as sickle cell anaemia or thalassemia.
9. History of glaucoma.
10. History of Non-Arteritic Anterior Ischemic Optic Neuropathy (NAION).
11. History of prostatectomy.
12. History of alcohol abuse or excessive intake of alcohol, as judged by the Investigator.
13. Presence or history of drug abuse, as judged by the Investigator.
14. History of, or current use of anabolic steroids, as judged by the Investigator.
15. Bleeding deficiencies or ongoing anticoagulant therapy that would put the participant at risk, as judged by the investigator.
16. Uncontrolled cardiac disease within 6 months of screening, including but not limited to uncontrolled hypertension; unstable angina; myocardial infarction or cerebrovascular accident.
17. Use of nitrate medications within 14 days prior to the screening visit.
18. Use of any drug with narrow therapeutic index or drugs that are sensitive substrates, strong inducers or strong inhibitors to CYP3A4 as well as substrates and inhibitors of OATP1B1 or sensitive to substrates to CYP2B6 in accordance with the list provided (see Section 9.6.2.1).
19. Use of oral, injectable, intra-urethral, or topical pro-erectile drugs or supplements, including but not limited to PDE5-Is or prostaglandin E1, or use of devices for ED treatment, within 14 days prior to screening.
20. Primary hypoactive sexual desire.
21. Presence of penile anatomical abnormalities, such as penile fibrosis or Peyronie's disease, which would cause significantly impaired sexual performance, as judged by the Investigator.
22. Insufficient therapeutic effect when using PDE5-Is.
23. History of, or ongoing antiandrogen treatment.
24. Any positive result at the screening visit for serum hepatitis B surface antigen, hepatitis B and C antibodies and/or human immunodeficiency virus (HIV).
25. Abnormal vital signs, laboratory test value or ECG of clinical significance, as judged by the Investigator.
26. Moderate to severe renal impairment with an eGFR (creatinine) ≤60 mL/min (revised Malmö-Lund equation).
27. Moderate to severe hepatic impairment at the time of the screening visit, as judged by the Investigator.
28. Plasma donation within one month of screening or blood donation (or corresponding blood loss) during the last three months prior to the screening visit.
29. Planned treatment or treatment with another investigational therapy (i.e., small molecule or biologic) within 3 months prior to the screening visit.
30. Involvement in the planning, and/or conduct of the trial.
31. The Investigator considers the participant unlikely to comply with trial procedures, restrictions and requirements.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Double

Number of Arms

4

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Placebo Comparator: Placebo; LIB-01 Placebo, oral suspension	Drug: LIB-01 Placebo; LIB-01 Placebo oral suspension
Experimental: LIB-01 10 mg; LIB-01 10 mg, oral suspension	Drug: LIB-01; LIB-01 oral suspension
Experimental: LIB-01 25 mg; LIB-01 25 mg, oral suspension	Drug: LIB-01; LIB-01 oral suspension
Experimental: LIB-01 50 mg; LIB-01 50 mg, oral suspension	Drug: LIB-01; LIB-01 oral suspension

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
To evaluate the efficacy of LIB-01 in the treatment of erectile dysfunction (ED).	Change from baseline in total score on the erectile function (EF) domain of the patient questionnaire International Index of Erectile Function (IIEF-EF) at week 4.	4 weeks

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
To evaluate the efficacy of LIB-01 in improving erectile function (ability to penetrate) during sexual intercourse.	Percentage of successful attempts by the Sexual Encounter Profile (SEP) question 2 throughout the trial period.	8 weeks
To evaluate the efficacy of LIB-01 in improving erectile function (maintained for completion) during sexual intercourse.	Percentage of successful attempts by the Sexual Encounter Profile (SEP) question 3 throughout the trial period.	8 weeks
To evaluate the efficacy of LIB-01 in improving erections.	Percentage of improved erections by the Global Assessment Question (GAQ) at week 4 and week 8.	8 weeks
To evaluate the incidence of treatment-emergent adverse events as assessed by Common Terminology Criteria for Adverse Events (CTCAE) following oral dosing of LIB-01	Frequency, seriousness and intensity of adverse events (AEs). Adverse events will be graded from 1-5 by the Common Terminology Criteria for Adverse Events (CTCAE): Grade 1, Mild; asymptomatic or mild symptoms; clinical or diagnostic observations only; intervention not indicated. Grade 2, Moderate; minimal, local or non-invasive intervention indicated; limiting age-appropriate instrumental activities of daily living (ADL). Grade 3, Severe or medically significant but not immediately life-threatening; hospitalisation or prolongation of hospitalisation indicated; disabling; limiting self- care ADL. Grade 4, Life-threatening consequences: urgent intervention indicated. Grade 5, Death related to AE.	8 weeks
To evaluate changes in vital signs (blood pressure), following oral dosing of LIB-01.	Clinically significant changes in blood pressure.	8 weeks
To evaluate changes in vital signs (pulse), following oral dosing of LIB-01.	Clinically significant changes in pulse.	8 weeks
To evaluate changes in vital signs (respiratory rate), following oral dosing of LIB-01.	Clinically significant changes in respiratory rate.	8 weeks
To evaluate changes in vital signs (body temperature), following oral dosing of LIB-01.	Clinically significant changes in vital body temperature.	8 weeks
To evaluate changes in ECG parameters (resting heart rate [HR]), following oral dosing of LIB-01.	Clinically significant changes in resting heart rate (HR).	8 weeks
To evaluate changes in ECG parameters (PQ/PR), following oral dosing of LIB-01.	Clinically significant changes in PQ/PR interval.	8 weeks
To evaluate changes in ECG parameters (QRS), following oral dosing of LIB-01.	Clinically significant changes in QRS interval.	8 weeks
To evaluate changes in ECG parameters (QT), following oral dosing of LIB-01.	Clinically significant changes in QT interval.	8 weeks
To evaluate changes in ECG parameters (QTcF [corrected QT interval by Fredericia]), following oral dosing of LIB-01.	Clinically significant changes in QTcF interval.	8 weeks

Collaborators and Investigators

• Sponsor: Dicot AB

Study record dates

Study Major Dates

• Study Start (Actual): November 8, 2024
• Primary Completion (Actual): July 19, 2025
• Study Completion (Actual): August 19, 2025

Study Registration Dates

• First Submitted: November 19, 2024
• First Submitted That Met QC Criteria: November 21, 2024
• First Posted (Actual): November 25, 2024

Study Record Updates

• Last Update Posted (Actual): August 24, 2025
• Last Update Submitted That Met QC Criteria: August 22, 2025
• Last Verified: August 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Urogenital Diseases; Genital Diseases; Mental Disorders; Genital Diseases, Male; Male Urogenital Diseases; Sexual Dysfunction, Physiological; Sexual Dysfunctions, Psychological; Erectile Dysfunction
• Other Study ID Numbers: DCT4564

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No