272 In the index

RU58841 RU

A non-steroid topical compound studied for hair loss, working by blocking a hair-loss hormone right at the scalp rather than throughout the body. Human data come mainly from smaller studies and compounding-pharmacy use rather than proper FDA-reviewed trials, and it's never been formally approved.

Also known as RU-58841

Effects Skin and hair

Routes Topical

Legal status Research chemical

WADA Not listed

3D Molecular Structure of C₁₇H₁₈F₃N₃O₃

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Chemistry

Formula: C17H18F3N3O3
Molar mass: 369.34
CAS: 154992-24-2
PubChem CID: 132981

Reported dosing

User-reported

What has been reported in the literature and by users. This is a record of what is done, not a recommendation.

Typical dose Topical concentration of roughly 1.5-5% solution

Reported range Manufacturer/compounded formulations vary widely

Route Topical

Frequency Once daily

Duration Ongoing (chronic use required to maintain benefit)

An investigational topical antiandrogen for hair loss that was never brought to market by its original developer; current supply is entirely unregulated, compounded 'research chemical' product with no standardized quality control.

Where this comes from Discontinued early-phase development data; user-reported/research-chemical vendor literature

There is no approved human dosing for this compound. The figures above are what users and vendors report, not what has been established as safe or effective. Treat them as a record of what is done, not as guidance.

Variants

Name	Abbr	Route	Notes
RU58841 solution	RU-S	Topical	Dissolved in a propylene glycol or ethanol vehicle for scalp use.