365 In the index

Clostebol CLOS

A steroid available as a topical wound-healing product in some countries, better known for showing up in several high-profile doping cases. What's known about it in humans comes mostly from its topical medical use rather than studies of it as a muscle-builder.

Also known as 4-chlorotestosterone

Effects Build muscle

Routes Injectable Topical

Legal status Controlled substance

WADA Banned at all times

3D Molecular Structure of C₁₉H₂₇ClO₂

Drag to rotate · scroll to zoom

Chemistry

Formula: C19H27ClO2
Molar mass: 322.9
CAS: 1093-58-9
PubChem CID: 68947

Reported dosing

Limited data

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

Typical dose Not established for legitimate human use

Reported range Underground reports: 50-100 mg per injection, or topical cream application

Route Intramuscular injection or topical

Frequency Varies

Duration Not established

Approved in some countries only as a topical wound-healing product (e.g., Trofodermin); a Schedule III controlled substance for systemic/injectable use in the US. Has featured in several high-profile sport doping cases traced to topical exposure.

Where this comes from Historical/veterinary and topical-product literature

Human data for this compound is limited. Read the figures above as a record of reported use rather than established dosing.