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Evaluating Clascoterone Solution for Male Pattern Hair Loss

A 6-month Phase 3, Multicenter, Prospective, Randomized, Double-Blind, Vehicle-Controlled Study, to Evaluate the Efficacy and Safety of Topically Applied Clascoterone Solution for the Treatment of Androgenetic Alopecia in Males, Followed by a 6-month Single-Blind Treatment With Clascoterone or Vehicle Solution

Phase 3 Interventional Cassiopea SpA · NCT05910450

This study tests if a new solution called Clascoterone can help men with hair loss when used twice a day for six months.

Quick facts

PhasePhase 3
Study typeInterventional
Enrollment726 (estimated)
Ages18 Years and up
SexMale
SponsorCassiopea SpA Industry-sponsored
Drugs / interventionsChemotherapy, Radiation
Locations24 sites (North Little Rock, Arkansas and 23 other locations)
Trial IDNCT05910450 on ClinicalTrials.gov

What this trial studies

This study aims to assess the efficacy and safety of Clascoterone solution in treating male pattern hair loss, specifically focusing on its effects when applied twice daily for up to six months. The trial consists of two parts: the first part is a double-blind comparison of Clascoterone to a placebo, while the second part continues with responders from the first part in a single-blind format to evaluate long-term safety and efficacy. Participants will be monitored for their response to the treatment and adherence to study protocols.

Who should consider this trial

Good fit: Ideal candidates are males aged 18 and older with mild to moderate androgenetic alopecia in the temple and vertex regions.

Not a fit: Patients with severe hair loss or those who do not meet the specific criteria for androgenetic alopecia may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could provide an effective solution for men suffering from androgenetic alopecia, potentially restoring hair growth.

How similar studies have performed: Previous studies on similar topical treatments for hair loss have shown promising results, indicating potential for success with this approach.

Eligibility criteria

Show full inclusion / exclusion criteria 
Inclusion Criteria:

Subject can participate in this clinical study if all the following criteria are met:

1. Subject who is male ≥18 years old.
2. Subject who has provided written informed consent.
3. Subject who has mild to moderate AGA in temple and vertex region, rating III vertex to V on the Modified Norwood-Hamilton Scale (i.e., III vertex \[IIIv\], IV, or V), with a history of ongoing hair loss.
4. Subject who is willing to maintain the same hairstyle, hair length and hair color throughout the study.
5. Subject who is willing to comply with study instructions at home and return to the clinic for required visits.
6. Subject who agrees to continue his shampoo frequency and other general hair care products and regimen for the entire study.
7. Subject who agrees to maintain same dietary and supplement pattern.
8. Subjects who are sexually active with a female partner and are not surgically sterile (vasectomy performed at least 6 months prior to treatment) must agree to use an acceptable form of birth control as described in the informed consent form. For subjects, adequate forms of contraception include condom and spermicide in combination with other forms of female contraception. For females, an acceptable method (Pearl Index \<1%) would be to agree to use implants, injectables, combined oral contraceptives, some intrauterine devices, or be postmenopausal (defined as amenorrhea greater than 12 consecutive months in women 50 years of age or older), be surgically sterile (hysterectomy, bilateral tubal ligation \[at least 6 months prior\], or bilateral oophorectomy).

Exclusion Criteria:

Subjects who meet any of the following criteria are not eligible to participate in the study:

1. Subject who has any dermatological disorders of the scalp in the target region with the possibility of interfering with the application of the IMP or examination method, such as fungal or bacterial infections, seborrheic dermatitis, psoriasis, eczema, folliculitis, scars, or scalp atrophy.
2. Subject who has any skin pathology or condition that, in the investigator's opinion, could interfere with the evaluation of the IMP or requires use of interfering topical, systemic (e.g., uncontrolled thyroid disease, certain genetic disorders that involve hair growth or patterns), or surgical therapy.
3. Subject who has current or recent history (within 6 months) of hair weaves, non-breathable wigs, or hair bonding.
4. Subject who had scalp hair transplants at any time.
5. Subject with a history of active hair loss due to diffuse telogen effluvium, alopecia areata, scarring alopecia, trichotillomania, or conditions/diseases other than AGA.
6. Subject who has a current or recent history (within 6 months) of severe dietary or weight changes or has a history of eating disorder(s), any history of bariatric surgery (gastric bypass, gastric sleeve, stomach stapling); macro- or micro-nutrient deficiencies within the last 6 months (i.e.: clinically significant iron deficiency, protein deficiency confirmed by lab testing) and/or any current diagnosis of malabsorptive disease (i.e.: Celiac, Irritable Bowel disease etc.).
7. Subject who has any condition which, in the investigator's opinion, would make it unsafe for the subject to participate in this study, including 12-lead electrocardiogram (ECG) findings during the screening period.
8. Subject is currently enrolled in an investigational drug or device study.
9. Subject who has used an investigational drug or investigational device treatment within 30 days or 5 half-lives whichever is longer prior to Visit 2/Baseline.
10. Subject who is unable to communicate or cooperate with the investigator due to language problems, poor mental development, or impaired cerebral function.
11. Subject who has used or is suspected, in the investigator's opinion, to be using anabolic steroids.
12. Subject who may be unreliable for the study, including subjects who engage in excessive alcohol intake or drug abuse, and/or subjects who will be unable to return for scheduled follow-up visits.
13. Subject who has a known hypersensitivity or previous allergic reaction to any of the active or inactive ingredients in the IMPs or tattoo ink.
14. Subject who has used any of the following topical preparations or procedures on the scalp:

    1. Topical scalp treatments for hair growth including minoxidil, Aminexil, hormone therapy, anti-androgens, or other agents that are known to affect hair growth within 12 weeks of Visit 2/Baseline.
    2. Topical scalp over-the-counter (OTC) or cosmetic treatments known or reasonably believed to affect hair growth (e.g., brands such as Maxilene, Nioxin, Foltene, etc.) or hair health or hair growth products with saw palmetto, copper, etc. within 2 weeks of Visit 2/Baseline.
    3. Topical scalp treatments that may have ancillary effect on hair growth including, but not limited to, corticosteroids, pimecrolimus, tacrolimus, and retinoids within 4 weeks of Visit 2/Baseline.
    4. Scalp procedures (surgical, laser, light, or energy treatments, micro-needling, etc.) within 6 months of Visit 2/Baseline.
    5. Platelet rich plasma (PRP) procedure on the scalp within 6 months of Visit 2/Baseline.
15. Subject who has used one or more of the following systemic medications or procedures:

    1. Beta blockers, cimetidine, diazoxide, or corticosteroids (including intramuscular and intralesional injections) within 12 weeks of Visit 2/Baseline. Inhaled, intranasal, or ocular corticosteroids are allowed if use is stable \[defined as doses and frequency unchanged for at least 4 weeks prior to Visit 2/Baseline\].
    2. Retinoid, isotretinoin, vitamin A intake above 10,000 IU per day, or cyclosporine therapy within 6 months of Visit 2/Baseline.
    3. Any 5 alpha reductase medications (i.e.: Finasteride \[Propecia®, etc.\], Dutasteride or similar products within 6 months of Visit 2/Baseline.
    4. Chemotherapy or cytotoxic agents at any time.
    5. Radiation of the scalp at any time point.
    6. Other systemic therapy, which in the opinion of the investigator, may materially affect the subject's hair or hair growth, including, but not limited to, spironolactone, vitamin or homeopathy supplement hair growth or hair health products or other steroid hormones (in any form), including anabolic steroids during the 3 months prior to baseline or during the study.
16. Subject who has been previously enrolled in any study with Clascoterone (former CB 03 01).
17. Subject who is an employee or direct relative of an employee of the contract research organization (CRO), the study site, or the Sponsor.
18. Subject who is institutionalized because of legal or regulatory order.

Where this trial is running

North Little Rock, Arkansas and 23 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
View on ClinicalTrials.gov → Find more trials like this →
Conditions Alopecia, AndrogeneticAlopeciaAndrogeneticClascoterone solutionPhase 3RandomizedDouble-blindVehicle-controlled
Last reviewed 2026-06-09 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.