hey,, listen seems like you just joined,, start reading reading & re-reading about all the different compounds & what not before you start anything.. What they are,, what they do,, what they are used for,, what are the sides, recommended dosages & durations.. There is a vast amount of info that is easily understood by READING.... Just by stating you want to run primo for 8 weeks shows that you really don't know what you are doing.. I am not bashing you bro,, noone is going to spoon feed you & you do not want that anyway.. You want to have an idea of what you are doing then you can ask any question on here that is not already posted.. the VETS on here have put their time in they know what is going on but you will not be taken seriously without learning & asking an appropriate question..... Just advice & good luck & happy reading