Anabolic steroidAndrogenProhormoneAnabolic steroidOral17-alpha-alkylatedDesigner steroidChlorinated

Chlorodehydromethylandrostenediol

Also known as CDMA · Halodrol (prohormone versions) · Promagnon 25 · H-Drol

Written by enwyReviewed 5 Aug 20261 sources0 comments

Chlorodehydromethylandrostenediol (CDMA, marketed as 'Halodrol' prohormone versions and 'Promagnon') is the 3-beta-hydroxy diol precursor to 4-chlorodehydromethyltestosterone (oral turinabol). It is an orally active designer prohormone that converts partially in vivo toward a turinabol-like non-aromatising androgen, giving dry lean gains with 17-alpha-alkylated hepatotoxicity and no human trial data.

01 Overview

CDMA (4-chloro-17alpha-methyl-androst-1,4-diene-3beta,17beta-diol) was one of the most widely sold 'Halodrol' prohormones. It is structurally the diol analogue of oral turinabol and undergoes partial conversion to the active ketone androgen, so the practical profile resembles a milder oral turinabol: dry, no aromatisation, and androgenic.

Despite branding overlap with turinabol, CDMA is a distinct molecule sold without any clinical evaluation. Its 17-alpha-methyl group makes it hepatotoxic, and adverse-event reporting for 'Halodrol' products includes cholestatic injury.

02 Mechanism

Prohormone that partially converts to a 4-chloro non-aromatising androgen binding the androgen receptor; 17-alpha-methylation gives oral activity; the 4-chloro group blocks aromatisation.

03 Dosing

Tier	Dose	Route	Notes
Anecdotal	50–100 mg/day	Oral	Grey-market prohormone dosing.

Ester comparison

Ester	Half-life	Injection freq.	Testosterone by mass

04 Effects

Effect	Magnitude	Evidence
Dry lean mass gainTurinabol-like dry gains without water retention.	2-4 kg reported	Anecdotal
Strength increaseProgressive strength over 4-6 week runs.	modest	Anecdotal

05 Side effects

Effect	Severity	Frequency	Evidence
Adverse lipidsHDL suppression typical of oral AAS.	Moderate	Common	Observational
HPTA suppressionSuppresses endogenous testosterone.	Moderate	Universal	Observational
HepatotoxicityCholestatic liver injury reported with Halodrol-type products.	Severe	Common	Observational

06 Legal status

United Kingdom

Class C

Anabolic steroid. · as of Jan 2026

United States

Schedule III controlled

Added via Designer Anabolic Steroid Control Act 2014. · as of Jan 2026

07 References

Anabolic steroid-induced hepatotoxicity from prohormone supplementsWorld Journal of Gastroenterology

08 Discussion0 comments

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This page is reference information, not medical advice. Doses and protocols are documented as they appear in the clinical literature and in practice — describing them is not a recommendation to use them. Countermeasures listed here are not a substitute for a physician. Legal status varies by jurisdiction and changes.