Its your call really. As far as safety, yes it should be safe to continue use. However, in my experience it is nice to take a short (2 weeks or so) breather from NO products, especially pre-workout formulas as my body tends to "get used" to their benefits, and I have to continually up the dose to get the same effect. Also, I find that changing the product each time helps to prevent a sort of immunity to any one thing. This is just my experience, others may disagree.