A Dose Ranging Study to Examine TDS-Testosterone 5% (PARC-T-D)

September 2, 2025 updated by: Transdermal Delivery Solutions Corp

A Multiple-Dose, Single Period, Phase II Dose Ranging Study to Examine TDS-Testosterone 5% in Adult Male Subjects

This study is a continuation of previous studies done in healthy volunteers to prove the efficacy of delivering Testosterone, the male hormone, rapidly across intact skin in s series of doses from low to high in men with low-to-no natural testosterone production to measure their response to the varying doses. The results of this study will inform further studies which will be longer in length, as to the starting doses. The study will be conducted in London, U.K. at the Advanced Therapies Centre, The London Clinic.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

48 Patients will be enrolled following 2 independent verifying blood tests of their diagnosis of Hypogonadism. there will be 4 cohorts of 12 subjects, each receiving doses of the trail materials, titrated by means of number of sprays applied. Doses will range from 10 to 70 mgs Testosterone.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
48

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

  • Name: Chandan AS Alam, MD
  • Phone Number: 011-44-7785-717596
  • Email: calam@tdsc.us

Study Locations

  • United Kingdom
      • London, United Kingdom, NW1 4LJ
        • Advanced Therapies Centre, The London Clinic

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 75 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Hypogonadal Male subjects - morning testosterone level ≤300 ng/dL (10.4 ng/L).
  2. 18 and 75 years of age, inclusive.
  3. The subject is willing and able to read, understand the Subject Information Sheet and provide written informed consent.
  4. The subject has a body mass index (BMI) within 18-30 kg/m2.
  5. The subject is in otherwise good health as determined by medical history and physical examination.
  6. The subject is a non-smoker.
  7. The subject must agree to comply with the placement of an indwelling catheter on two separate occasions and the drawing of blood samples for the pharmacokinetic assessments.
  8. The subject is willing and able to comply with all testing and requirements defined in the protocol.
  9. The subject is willing and able to return to the study site for all visits.

Exclusion Criteria:

  1. The subject has any relevant deviations from normal in physical examination, electrocardiogram (ECG), or clinical laboratory tests, as evaluated by the investigator, particularly an elevated PSA reading >4.0 ng/ml or ALT and AST greater than 2 times the upper limit of normal, clinically significant anemia (hematocrit <35%) or renal dysfunction (creatinine >2mg/dL), active deep vein thrombosis, thromboembolic disorders or history of these conditions.
  2. The subject has had a clinically significant illness within 30 days preceding entry into this study.
  3. The subject has a history of significant neurological, hepatic, renal, endocrine, cardiovascular, gastrointestinal, pulmonary, or metabolic disease.
  4. The subject has a known allergy or history of hypersensitivity to Testosterone or similar compounds.
  5. The subject has used any prescription medication within 14 days or over-the-counter (OTC) medication or alcohol within 48 hours of dosing or intends to use any prescription or OTC medication during the study that may interfere with the evaluation of study medication.
  6. The subject has donated or lost a significant volume of blood (>450 mL) within four (4) weeks of the study, and their haemoglobin concentration and haematocrit have not returned to within 5% of normal.
  7. The subject has a Hematocrit level > 51%
  8. The subject has a history of substance abuse or a current positive urine drug screen or urine alcohol test.
  9. Alcohol consumption greater than community norms (i.e. more than 21 standard drinks per week for males).
  10. Subjects who have received an investigational drug or have used an investigational device in the 30 days prior to study entry.
  11. Subjects with an American Urological Association System Index for Prostatism score greater than 7
  12. Subjects with a history of prostate or breast carcinoma.
  13. Subjects with prostatic mass on screening physical examination.
  14. Subjects with a history of significant skin disease.
  15. Subjects with a history of sleep apnea.
  16. Subject with a partner with a history of breast cancer.
  17. Subject with a partner of child bearing potential who is not willing to use adequate contraception for the duration of the trial.
  18. Subject whose partner is pregnant.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Active Comparator: Forearm dose
Half of Ss will receive their dose of Testosterone on the inner aspects of their forearms.
Drug: Testosterone
10,30,50 and 70 mg doses of micronized Testosterone delivered by means of a new liquid transdermal delivery solution, HypoSpray(R)once daily for 7 days or until halted due to systemic or dermal reactions.
Device: Pump Sprayer
A dose of product solution is delivered by means of a metered pump spray.
Active Comparator: Chest Dose
Half of Ss will receive their dose of Testosterone on the chest.
Drug: Testosterone
10,30,50 and 70 mg doses of micronized Testosterone delivered by means of a new liquid transdermal delivery solution, HypoSpray(R)once daily for 7 days or until halted due to systemic or dermal reactions.
Device: Pump Sprayer
A dose of product solution is delivered by means of a metered pump spray.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Dose Range Measure of serum levels of testosterone in response to varying doses
Time Frame: 1 week
A pharmacokinetic measure of serum levels of testosterone in response to varying doses of from 10 to 70 mgs of Testosterone.
1 week

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Dermal Safety as measured by
Time Frame: 1 Week
Incidence of treatment-emergent side effects.
1 Week

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Transdermal Delivery Solutions Corp

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Advanced Therapies Centre, The London Clinic

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Shern L. Chew, M.D., Ph.D., Consultant Physician and Professor of Endocrine Medicine

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
June 1, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
October 1, 2026

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
February 1, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
July 3, 2013

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 9, 2013

First Posted (Estimated)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
July 10, 2013

Study Record Updates

Last Update Posted (Estimated)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 3, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 2, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
September 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • PARC-Testosterone-D1/09/13
  • 2013-001766-42 (EudraCT Number)
  • IRAS project ID: 146877 (Other Identifier: London - West London & GTAC Research Ethics Committee)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

Yes

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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