Doctor said arimidex is wrong

My freind is receiving replacement therapy (test, deca) & anti-agig meds (GH) fom a well known plastic surgeon/ anti-aging specialist (hint there is an interview with him in T-mag) He gave him nolvadex as an anti-estrogen, when he asked about Arimidex he said stay as far away as possible, he didn’t have enough time to explain all the problems with Arimidex. Yet T.C.
advocates 1/4mg EOD for men over 40. Other sites say The PDR indictes Arimidex lowers both estrogen testosterone??? Who is right??