do not take Free Test and Erase at the same time. i am sure you can take half the dosage of Free Test and half the dosage of Erase and be fine, but you would not see the benefits from a full dose of one or the other, since Free Test contains other ingredients that benefit test boosting/cort control. it would benefit you if you used one or the other then saved the one you did not use for your next stack. cant go wrong with choosing one or the other, but if you have both, IMO, just take one for now.