NANDRO P 100 is a C18 steroid with androgenic and anabolic properties. It is generally prepared from alkyl ethers of estradiol to resemble testosterone but has one less carbon at the 19 position. Nandrolpne phenylpropionate is an androgen receptor agonist. The drug bound to the receptor complexes which allows it to enter the nucleus and bind directly to specific nucleotide sequences of the chromosomal DNA. The areas of binding are called hormone response elements (HREs), and influence transcriptional activity of certain genes, producing the androgen effects.