The original brand name of oxandrolone was Anavar, which was marketed in the United States and the Netherlands .   This product was eventually discontinued and replaced in the United States with a new product named Oxandrin, which is the sole remaining brand name for oxandrolone in the United States.   Oxandrolone has also been sold under the brand names Antitriol ( Spain ), Anatrophill ( France ), Lipidex ( Brazil ), Lonavar ( Argentina , Australia , Italy ), Protivar, and Vasorome ( Japan ) among others.     Additional brand names exist for products that are manufactured for the steroid black market. 
Clomid differs from Nolvadex in that while SERMs are always anti-estrogenic in some tissues, they are estrogenic in others. Fortunately, both Clomid and Nolvadex are anti-estrogenic in the hypothalamus, making them useful for post-cycle therapy (PCT), and anti-estrogenic in breast tissue, making them useful as anti-gyno agents. Clomid however is estrogenic in the pituitary, which in some instances may even enhance its value for PCT. It’s likely estrogenic to at least some other neurons in the brain as well, causing increased emotionality. With regard to body fat and muscle, or any observable physical property, Clomid and Nolvadex have no other adverse estrogenic effects, but instead are useful anti-estrogens .
Like the IFBB which is not a natural competition, Natural Bodybuilding has many organizations with competitions where one can earn the rank of a natural professional bodybuilder. Such organizations routinely test for controlled and banned substances including Anabolic steroids , Prohormone and Diuretics . Professional natural bodybuilding organizations include the IFPA (International Fitness and Physique Association) the professional affiliation to the OCB and NANBF, NGA (National Gym Association), INBA(International Natural Bodybuilding Association ), WNBF(World Natural Bodybuilding Federation) the professional affiliation to the INBF, and NEPA.