deca can cause gyno by the progesterone it creates (although unlikely at your dosage). this is treated with bromo. more likely, according to dr dipasquale in Drug Use and Detection in Amateur Sports, Update 5, nolvadex actually increases estrogen levels in some rare people. you may have lost the genetic lottery. don't worry about it, everybody has some kind of drug they don't interact well with, and there are better anti-estrogens out there, like arimidex