Nolvadex (tamoxifen) its one of the most popular drugs in the bodybuilding world and in general in the medical field. It belongs to a group of drugs called “SERMS” selective oestrogen receptor moderators. Sometimes people just think of it as an Anti oestrogen. but it’s an oestrogen agonist and antagonist because it binds to the oestrogen receptor. After cycles its used to block oestrogen and boost hormone levels and that’s why it’s extremely popular. It was only in the late 80s bodybuilders came to realise its importance because they could use Nolvadexwhile on a steroid cycle it would help with oestrogen build up and not be too powerful that it would shut everything down. It also blocks the receptors in breast tissue so it will target gynecomastia lumps directly so a good solid drug in many cases.