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CompletedNCT06924632Updated May 18, 2026

Efficacy & Safety of Minoxidil SL Tablets in Men With AGA

A Phase 3 interventional study of Minoxidil and Placebo in Androgenetic Alopecia and Male Pattern Baldness, sponsored by Samson Clinical Operations Pty Ltd. Completed at 3 sites in Australia. Open to male participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-05-18.

Sponsored by Samson Clinical Operations Pty Ltd · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
142
Allocation
Randomized
Ages
18 Years and older
Sex
Male
01

Study summary

This is a phase 3, multicentre, randomised, double-blinded, placebo-controlled study examining the safety and efficacy of 2.5 mg sublingual (SL) minoxidil tablets taken twice daily in the treatment of androgenetic alopecia (AGA) in men. The duration of study participation is 32 weeks including screening and safety follow up.

The primary efficacy objective is to determine whether treatment with 2.5 mg SL tablets twice daily increases the number of hairs in men with AGA over 24 weeks. The primary safety objective is to evaluate the safety and tolerability of 2.5 mg SL tablets administered twice daily over 24 weeks.

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Conditions studied

  • Androgenetic Alopecia
  • Male Pattern Baldness

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Keywords

  • Hair Loss
  • Male Pattern Balding
03

In context

Alopecia

609 studies on the registry are indexed under Alopecia; 131 are open to participants now.

This study's enrollment of 142 is above the median of 45 across 513 interventional studies indexed under Alopecia.

Browse Alopecia studies →

Lead sponsor

This is the only study on the registry with Samson Clinical Operations Pty Ltd as lead sponsor.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
Male
Accepts healthy volunteers
No

Inclusion criteria

  • Cisgender males of at least 18 years of age (inclusive) at the time of Screening.
  • In good general health in the opinion of the Investigator.
  • Presence of androgenetic alopecia with hair density reduction in the centroparietal area or vertex of the scalp classified as Norwood-Hamilton Type III vertex, IV, V or VI.
  • Willing and able to attend all study visits and comply with treatment plan and required study procedures including scalp tattooing and hair trimming.
  • Willing to maintain the same hair style, hair colour, and hair length in non-balding areas.
  • Able to comprehend and willing to sign and date a written patient informed consent form (PICF).

Exclusion criteria

Exclusion Criteria:

  • Norwood-Hamilton Type IIIa, IVa, and Va grades (i.e. participants must have vertex balding).
  • Use of topical minoxidil, oral minoxidil, dutasteride, finasteride, drugs with anti-androgenetic or androgenetic properties, or medications that cause hypertrichosis or hypotrichosis within the 6 months prior to enrolment.
  • Laser treatment of the scalp within 3 months prior to enrolment.
  • History of scalp micropigmentation or hair restoration surgery.
  • Use of wigs, hair extensions, hair pieces, or hair weaves at time of enrolment.
  • Use of anti-hypertensive medication.
  • Current participation in any other investigational drug or medical device trial, which includes administration of an investigational study medication or medical device, or participation in such a trial within 3 months or 5 half-lives of the investigational product, whichever is longer, prior to receiving the first dose.
  • History of hypersensitivity or allergies to minoxidil or any of the excipients contained in the study medication.
  • Known allergy or sensitivity to tattoo ink.
  • Dermatological disorder (e.g. eczema, psoriasis) or infection affecting the target area (vertex or centroparietal area).
  • Scalp characteristics, including scarring, that may interfere with examinations.
  • Medical condition which adversely affects hair loss.
  • Specific underlying conditions (e.g. cardiovascular disease, congestive cardiac failure, cardiac arrhythmia, systemic lupus erythematosus, history of phaeochromocytoma, pulmonary hypertension secondary to mitral stenosis, minoxidil hypersensitivity), clinically significant findings from medical history, clinical laboratory tests, ECG, or vital signs that, in the opinion of the Investigator, could interfere with the objectives of the study or put the participant at risk.
  • Moderate to severe renal or hepatic impairment.
  • Hypotension (blood pressure less than 90/60 mmHg) or a history of significant symptomatic postural hypotension.
  • Untreated or uncontrolled hypertension (blood pressure greater than 150/90 mmHg, not stable on current medication for the past 3 months).
  • History or evidence of hair loss other than androgenetic alopecia.
  • Unwilling to comply with all study procedures and assessments.
  • Scalp hair length less than \~2.5 cm
  • History of alcohol and/or substance abuse, or drug-abuse disorders.
  • Major surgery within 4 weeks prior to the screening evaluation, or planned surgery prior to completion of all study procedures.
  • Site employees or immediate family members of study site employees.
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
142 participants (actual)

Study arms

  • Experimental
    2.5 mg Sublingual Minoxidil BID

    2.5 mg sublingual minoxidil to be taken twice a day, once in the AM and once in the PM.

    Drug: Minoxidil

  • Placebo comparator
    Placebo BID

    placebo to be taken sublingually twice a day, once in the AM and once in the PM.

    Drug: Placebo

Interventions

  • DrugMinoxidil

    2.5 mg Sublingual Minoxidil Tablet

  • DrugPlacebo

    Placebo

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What researchers measure

Primary outcomes

  1. Mean Change in Non-vellus Target Area Hair Counts (TAHC)

    Mean change in the vertex scalp non-vellus TAHC from baseline to week 24.

    Time frame: 24 Weeks

07

Study locations

3 sites
  • Premier Specialists Pty Ltd
    Kogarah, New South Wales 2217, Australia
  • DIRECT
    East Melbourne, Victoria 3002, Australia
  • DIRECT
    Pascoe Vale, Victoria 3044, Australia
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References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 18, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT06924632
Lead sponsor
Samson Clinical Operations Pty Ltd
Responsible party
Sponsor
First posted
Apr 11, 2025
Start date
Jul 14, 2025
Primary completion
May 15, 2026
Completion
May 15, 2026
Last update
May 18, 2026

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Oct 2025. You cannot join it, but the record below documents what was studied.

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