Nolvadex is a popular and powerfully effective Selective Estrogen Receptor Modulator (SERM) that is often referred to as an anti-estrogen. However, while being an antagonist it is also an agonist as it will actually act as estrogen in certain parts of the body while acting as an anti-estrogen in other areas. As one of the oldest SERM’s on the market that is still regularly used medicinally, while Nolvadex is also used by anabolic steroid users it is not an anabolic steroid. This is an important note as some are often confused by its use in steroid cycles. Nolvadex is simply a SERM. Nolvadex, officially known as Tamoxifen Citrate, was first developed in 1961 by ICI now AstraZeneca under the trade name Nolvadex. The SERM was developed to treat breast cancer, specifically hormone-responsive breast cancer. However, it has also been effectively used in breast cancer prevention. Then we have anabolic steroid users, and it was long ago discovered that Nolvadex had a place among such individuals. Nolva, as it’s commonly known, can be used as an anti-estrogen during an anabolic steroid cycle in order to prevent estrogenic related side effects. It is also used as part of a Post Cycle Therapy (PCT) recovery plan, which is its most common and beneficial point of use for the steroid user.