Hair Loss Treatment

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Product Name: RU-58841
CAS: 154992-24-2
MF: C17H18F3N3O3
MW: 369.3383
Purity: 99%
BP: 493.6°C at 760 mmHg
FP: 252.3°C
Density: 1.39g/cm3
Grade: Pharmaceutical Grade
Appearance: White Powder


RU58841 is a specific androgen receptor antagonist or a so called anti-androgen. This non steroidal topical androgen antagonist was investigated for therapeutic value in androgenetic alopecia and acne. In studies and clinical trials RU58841 has shown to:

Strongly compete against DHT 

Increase cellular replication rate in the matrix cells

Increase cellular proliferation of outer root sheeth cells

Increase hair diameter and hair density

Increase the percentage of hair in the anagen phase

Provide equivalent or better net growth than Finasteride

RU58841 works by binding to the androgen receptor in the hair follicle. Therefore androgens don’t have the chance to bind and start the chain reaction of androgenetic alopecia and begin the so called miniaturization process. It has been demonstrated to interrupt this hair loss message locally so that normal hair growth could continue.

Topical RU58841 has a very short half-life (1 hr) in comparison to the oral ingestion of Finasteride (6 hrs) and Dutasteride (5 weeks!). Moreover, RU58841 does not inhibit DHT production like the latter two products.  These facts seem to suggest that there is minimal chance of any serious or permanent side effects, and anecdotal evidence on the forums seems to support that. However, because many people are buying RU58841 from online sometimes unknown and unverified suppliers, there is no guarantee of any kind of safety at all.  I am not planning to buy RU58841 online because of safety issues.  The product is also quite expensive in comparison to Minoxidil or Finasteride.  If you really do wish to buy this product, consult a doctor first.

Side Effects

Despite it being safe in theory, users who have experimented on themselves with RU58841 have reported side effects including:

Skin irritation

Blurred vision




Reduced libido

Erectile dysfunction


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