As with all anabolic steroids Oxandrolone will suppress natural testosterone production in men. Testosterone suppression does vary from steroid to steroid in terms of the rate and Oxandrolone is one of the milder forms. However, most all men will still need some form of exogenous testosterone if they are using Oxandrolone at any significant dose for any significant time. Those who do not supplement with testosterone have an excellent chance of putting themselves into a low testosterone condition. For the purpose of information a performance level dosing of Oxandrolone will suppress natural testosterone production in most men by dropping serum testosterone levels by 50%. This will put most men into a low level state and if not certainly in a below optimal state.
Once the use of Oxandrolone is done and it along with all anabolic steroids has cleared the body natural testosterone production will begin again. It’s important to note that recovering prior natural levels assumes no prior low level condition existed and that there was no damage done to the HPTA during steroid use . Most men will need a Post Cycle Therapy (PCT) plan to aid in recovery, but they should also note that PCT will not promote full recovery. It takes several months to recover from anabolic steroid use and there’s no guarantee that you always will even with the best PCT plan in the world.
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.