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As a synthetic, orally active anabolic-androgenic steroid (AAS) and a 17α-alkylated derivative of 4-androstenediol, 4-chloro-17a-methyl-androst-1,4-diene-3,17b-diol was never marketed. It was first encountered in 2005 when it was introduced as a dietary supplement and putative prohormone under the name Halodrol-50 by industry veteran, Bruce Kneller while working with the dietary supplement company, Gaspari Nutrition.

Halodrol is a 17-alpha alkylated steroid that converts to the steroid Oral Turinabol (C365220) after interacting with 3-β-HSD enzyme. Studies suggested the lack of progestational effects of Halodrol m ay be due to the the 4-chloro group, where it restricts the interaction with aromatase enzyme to produce inactive 4-chloro-DHT metabolites, thus producing significantly less androgenic side effects.

When taken by mouth: Halodrol-50 (4-chloro-17a-methyl-androst-1,4-diene-3,17b-diol) is possibly unsafe for most people when taken by mouth. Side effects include liver damage, infertility, behavioral changes, hair loss, and others.