These steroids are marketed under the trade name Nolvadex and officially known as Tamoxifen Citrate. It was developed to treat breast cancer specifically those type that respond to hormones. It is used by bodybuilders as an anti-estrogen during an anabolic steroid cycle to prevent estrogenic side effects. This works when this drug prevents estrogen hormone from performing its function in certain parts of the body. It also possesses strong testosterone, stimulating characteristics. This drug also used in Post Cycle Therapy (PCT) recovery plan.