Could a prostate drug stop shoulder infections before they start?
NCT ID NCT07731802
First seen Jul 28, 2026 · Last updated Jul 29, 2026 · Updated 1 time
Summary
This trial tests whether finasteride, a drug that blocks testosterone production, can reduce levels of Cutibacterium acnes bacteria on the skin. High testosterone is linked to more of this bacteria, which can cause serious infections during shoulder replacement surgery. Healthy men aged 18 to 65 will take either finasteride or a placebo daily for two weeks, and researchers will measure changes in skin bacteria and blood testosterone levels.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- finasteride 1 mg taken daily for two weeks
- What this could lead to
- If it works, this could point toward a simple, short-term way to reduce infection risk before shoulder replacement surgery.
- What could go wrong
- This is a small, early-phase trial with only 40 men. It tests a surrogate marker (skin bacteria), not actual infection rates, so success here may not prevent infections in practice.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 4
Runs after approval, following long-term safety and how well the treatment works in everyday use.
- Participants
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About 40 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Aug 2026
An estimate. Start dates often move.
- Expected to finish
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Aug 2027
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 65 years
- Sex
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Male participants only
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion We will include the group most impacted by PJI * Adult males * Age between 18 and 65 Exclusion * History of cryptorchidism, hypospadias, or other congenital abnormality of male reproductive tract * Female sex * Age younger than 18 or older than 65 * Current use of Finasteride or other 5-alpha reductase inhibitors * Current use of hormone replacement medications such as testosterone * Recent antibiotic use within 3 months * Have had a negative reaction to oral Finasteride before * Recent use of acne treatment within 3 months * Self-report very sensitive skin * Allergic to chlorhexidine or isopropyl alcohol * Have open wounds on both shoulders
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
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