testosterone undecanoate http://purl.bioontology.org/ontology/MESH/C010792 http://purl.bioontology.org/ontology/SNOMEDCT/395900004 http://purl.obolibrary.org/obo/CHEBI_135741 http://purl.obolibrary.org/obo/NCIT_C1249 https://en.wikipedia.org/wiki/Testosterone_undecanoate https://www.wikidata.org/wiki/Q15410178 Testosterone undecanoate, sold for use by mouth under the brand names Andriol and Jatenzo and for use by injection under the brand names Aveed and Nebido, is an androgen and anabolic steroid (AAS) medication which is used mainly in the treatment of low testosterone levels in men, which includes hormone therapy for transgender men. It is taken by mouth two to three times per day with food or given by injection into muscle once every 3.5 days to 2 weeks, depending on individual response. The undecanoate ester form of the androgen testosterone, with gonadotropin-secretory inhibiting and hormone replacement activity. As testosterone inhibits the secretion of gonadotropins from the pituitary gland, administration of testosterone decreases the secretion of luteinizing hormone (LH). By inhibiting LH secretion, the growth of Leydig cells, which are normally stimulated by LH to produce testosterone, may be suppressed. testosterone testosterone ester