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Comparing Direct and Indirect Detection Methods of Multiple Routes of Testosterone Administration

Comparing Direct and Indirect Detection Methods Following Multiple Routes of Testosterone administration-an Anti-doping Perspective

Status
Completed
Phases
Early Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06393634
Acronym
T esters
Enrollment
14
Registered
2024-05-01
Start date
2024-11-27
Completion date
2024-11-27
Last updated
2024-12-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy

Brief summary

Testosterone abuse is extremely prevalent in athletes globally and especially in the United States professional sporting leagues

Detailed description

Because human bodies make testosterone naturally, it can be difficult to determine whether the testosterone in your body is natural or if it came from administering testosterone. Currently, testosterone abuse by athletes is detected by anti-doping laboratories in urine samples and use can also be inferred by testing blood samples. As a pharmaceutical preparation, testosterone is available to administer to your body in different ways. However, due to lack of controlled data on the various preparations of testosterone administrations related to the anti-doping field, this study id designed to look at five different testosterone preparations delivered three different ways and how they compare to each other in terms of anti-doping detection and how long they will be in circulation in your body.

Interventions

A single injection of testosterone

DRUGTestosterone gel

A daily dose of testosterone gel

DRUGTestosterone Oral

A twice-daily pill of testosterone pill to swallow

Sponsors

Sports Medicine Research and Testing Laboratory
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
NONE

Intervention model description

Three groups in phase one and two groups in phase two, randomized by a computer.

Eligibility

Sex/Gender
MALE
Age
18 Years to 60 Years
Healthy volunteers
Yes

Inclusion criteria

* HEALTHY MALE ADULTS, AGED 18-60 YEARS

Exclusion criteria

* Individuals currently enrolled in a registered testing pool for anti-doping purposes * Unwilling to provide urine or blood samples * Individuals who are not actively exercising * Individuals who show a high risk of heart attack or cardiovascular disease as defined by a physician * Individuals that have an elevated baseline hematocrit as determined by the PI * Individuals who are diabetic or are currently taking diabetic medications. * Individuals that have donated blood (approximately 500 mL) in the past 8 weeks * Individuals with severe acne * Individuals with a history of cancer, cardiac, renal or hepatic disease

Design outcomes

Primary

MeasureTime frameDescription
Detection windows of testosterone administered via injection, oral and skin cream.12 weeksChanges in urinary testosterone/epitestosterone ratio after administration of testosterone in injection, oral and cream
Changes in serum concentration of testosterone12 weeksChanges in serum concentrations of testosterone in injection, oral and cream administration of testosterone
Changes in serum concentration of androstenedione12 weeksChanges in serum concentrations of androstenedione in injection, oral and cream administration of testosterone
Changes in serum concentration of luteinizing hormone12 weeksChanges in serum concentrations of luteinizing hormone after injection, oral and cream administration of testosterone

Secondary

MeasureTime frameDescription
Direct detection of testosterone esters12 weeksDirect detection of testosterone esters

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026