Well, by extreme side effects I'm guessing you are referring to things like gyno. Beastdrol doesn't aromatize to estrogen so on cycle gyno symptoms shouldn't occur, though some that are gyno prone can get itchy nipples...etc. A good planned PCT is essential to control any estrogen rebound that could occur then
I've ran beast twice at 40mg a week, if u can handle it...do it. Strong stuff. Make no mistake beast is a oral steroid. Don't let that pro hormone thing fool u, that's just a disguise