6α-fluorotestosterone (6α-fluoro T) acts as a competitive inhibitor of aromatase cytochrome P450. The mechanism by which substitution of a fluorine at the 6 alpha-position interferes with the aromatization reaction remains to be determined, but the inhibitory action on estrogen formation may potentiate the androgenic properties of 6 alpha-fluorotestosterone in vivo due to a lowering of estrogen levels. Besides, 6α-fluoroT promotes male sex behavior, it does not promote mating by unassisted estrogen receptor binding and it does not promote mating via metabolism to another androgen.

β-Estradiol 17-acetate is a natural metabolite of estradiol. Hydrolytic enzymes in human cadaver, hairless dog, rat and hairless mouse skin can metabolize β-Estradiol 17-acetate to β-Estradiol. β-Estradiol 17-acetate transported across the human and hairless dog skin can be effectively metabolized before entering the capillary.