Trestolone is a synthetic androgen that inhibits the release of follicle-stimulating hormone and impairs spermatogenesis. Luteinizing hormone is also suppressed, which cuts production of testosterone. The azoospermia and oligospermia are reversible after discontinuation of trestolone. Trestolone has androgenic and anabolic properties and loss of secondary sex characteristics is not seen. Like testosterone, trestolone undergoes enzymatic aromatization to an estrogen. The use of trestolone instead of testosterone for androgen replacement therapy could have health-promoting effects by reducing the occurrence of prostate disease. Trestolone had been in phase II clinical trial for the andropause control. However, this development was discontinued.

Propetandrol is a pregnanediol derivative patented by Schering A.-G. as long-acting anabolic androgen. Propetandrol is potent in the prevention of tissue calcification and skeletal lesions.

Orotirelin (previously known as CG 3509) was investigated as a thyrotropin-releasing hormone. Experiments on rats have shown that compound could increase dopamine release from rodent brain. Information about the current study of this drug is not available.

Clostebol is a synthetic anabolic-androgenic steroid, a derivative of the natural hormone testosterone. Clostebol is a Schedule III controlled substance used medically in topical ophthalmologic and dermatologic treatments. Due to potential use as a performance-enhancing drug, clostebol is banned by the World Anti-Doping Agency.

ITROCINONIDE is a synthetic corticosteroid which showed no signs of systemic activity (cortisol depression).

ISOPREDNIDENE is a synthetic glucocorticoid. It suppresses both the release and the synthesis of adrenocorticotropin by the pituitary gland.

Enestebol is an anabolic steroid.

Halocortolone, a synthetic glucocorticoid that was used as a vasoconstrictor, but was never marketed

Cloticasone is a synthetic glucocorticoid corticosteroid, an analog of fluticasone. Cloticasone was discovered by Glaxo in the 1980s and claimed to be useful as an antiinflammation agent.

Tabimorelin is an orally active and selective growth hormone secretagogue (GHS) that was derived from growth hormone-releasing peptide-1(GHRP-1) via ipamorelin by a peptidomimetic approach. Tabimorelin inhibits both on gut and liver CYP3A4 activity. Tabimorelin has been in phase II clinical trials for the treatment of somatotropin deficiency. However, this research has been discontinued because the majority of growth hormone deficient adults did not respond to Tabimorelin.