The tamoxifen is needed at the first sign of gyno (itching, pain, irritation, ect), once breast tissue begins growing, surgery is the only permanent solution, but using something like Arimidex may shrink it and halt further growth.
Slash, I think the friend was referring to Nolvadex use as be carcinogenic, which has some factual basis. However, he doesn't have too much to worry about taking a few Nolvadex here and there----he should have taken them during his cycle when the symptoms started. I hope people see how important it is to have your anti-e's prior to starting your cycle---it sures a lot of unneccessary anguish and trouble.