![]() ■ can be used for a well-defined but diverse group of ingredients (e.g. ■ used as Primary ambiguous link, in which ATC Class is represented with a particular group of Ingredients with a common trait ■ hierarchical (applied at the post-processing, gives +1 level of separation) – contains only one Ingredient Group, which is mentioned somewhere in the middle – starts either from the Ingredient Group or the word of combinations ■ applied to Multicomponent ATC Classes, which names: ■ ATC - RxNorm primary upward connects the 1st Ingredient Groups of Multicomponent ATC Classes to respective Rx/RxN Standard Ingredients ■ the presence of this link is a prerequisite for creating a ‘Maps to’ relationship_id ■ used as a Secondary unambiguous link for ATC Classes with clear and well-defined Ingredient(s) ATC The Anatomical Therapeutic Chemical (ATC) Classification System is a drug classification system that classifies the active ingredients of drugs according to the organ or system on which they act and their therapeutic, pharmacological, and chemical properties. ■ ATC - RxNorm secondary lateral connects the 2nd Active Ingredient OR any subsequent Active Ingredient of a Multicomponent ATC Class to Rx/RxN Standard Ingredient ■ semantically, it is an equivalent to ‘Maps to’ relationship_id, and usually (except for exemptions) has such a pair in concept_relationship ■ used as a Primary unambiguous link for ATC Classes with a clear and well-defined Ingredient – the 1st Active Ingredient of Multicomponent ATC Classes with Standard Ingredients – Monocomponent ATC Classes with their full semantic equivalents in the form of main active Standard Ingredients ■ technically non-hierarchical, however, semantically it resembles the 'Subsumes' relationship_id with the reverse of 'Is a' Progestins (e.g.■ connects ATC Classes and Drug Products, but not Ingredients.17α-Ethynyltestosterone derivatives: Danazol.17α-Vinyltestosterone derivatives: Norvinisterone (vinylnortestosterone).Normethandrone (methylestrenolone, normethisterone).Requests for ATC classification of a medicinal substance should be addressed to the WHO Collaborating Centre for Drug Statistics Methodology in Oslo, Norway ( Application form ). 17α-Alkylated 19-nortestosterone derivatives: Ethylestrenol Procedure (to the top) All new entries in the ATC classification system are assigned on request from the users.17α-Alkylated dihydrotestosterone derivatives: Androisoxazole.Metandienone (methandienone, methandrostenolone).17α-Alkylated testosterone derivatives: Bolasterone.Trenbolone hexahydrobenzylcarbonate (trenbolone cyclohexylmethylcarbonate).Oxabolone cipionate (oxabolone cypionate).Nandrolone esters (e.g., nandrolone decanoate, nandrolone phenylpropionate).19-Nortestosterone derivatives: Bolandiol dipropionate.Metenolone enanthate (methenolone enanthate).Metenolone acetate (methenolone acetate).Drostanolone propionate (dromostanolone propionate). ![]() Dihydrotestosterone derivatives: Androstanolone (stanolone, dihydrotestosterone, DHT).Testosterone esters (e.g., testosterone cypionate, testosterone enanthate, testosterone propionate, testosterone undecanoate, testosterone ester mixtures ( Deposterona, Omnadren, Sustanon, Testoviron Depot)).Prasterone (dehydroepiandrosterone, DHEA).Testosterone derivatives: Androstenediol dipropionate.Bupropion ( +naltrexone +zonisamide †). ![]()
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