Nandrolone decanoate is different to the testosterone analogs listed above, since the parent molecule is nandrolone rather than testosterone. Although the two molecules are similar, nandrone is thought to be more efficacious. However, changes in libido, hepatotoxicity, an increased risk of cardiovascular disease, and antisocial behavior have been reported. In women, some of the masculinizing effects can be irreversible. It is primarily used to treat anemia, chronic renal failure, osteoporosis, and AIDS-associated wasting syndrome, in part by increasing hemoglobin levels and red blood cell mass. Nandrolone decanoate was approved by the FDA in 1983 and became a controlled substance in 1991.
Testosterone propionate has a half-life of ~15 days, which means that it is present in your body for around a month. This means that it does not need to be administered as often as testosterone esters with shorter carbon chains.