Notes: Tamoxifen (Item No. 27190) is an analytical reference standard categorized as a selective estrogen receptor modulator (SERM).{51126} Formulations containing tamoxifen have been used by bodybuilders to prevent gynecomastia associated with anabolic steroid use.{51127} Tamoxifen has been detected as an adverse analytical finding (AAF) during anti-doping testing.{48164} This product is intended for use in analytical forensic applications. This product is also available as a general research tool (Item Nos. 13258 / 11629).