I've always run Clomid and Nolva together for my PCT, although I only run the Clomid for the first week and the rest of PCT just use Nolva. In another thread on this board, based on a post of mine, the use of Clomid and Nolva together (at the same time) was questioned. Dr. D ended up responding later in the thread and stated he would not run them at the same time as the weaker of the two together would be negated by the other. He proposed running Clomid for two weeks followed by Nolva for two weeks. I've seen alot of posts where people run the two at the same time, but I'm not sure the chemistry supports this, as pointed out by Dr. D. His response and reputation made enough of a believer out of me that I won't run the two concurrently (at the same time) again. I will however run them consecutively, (one after the other). So, for what it's worth, you may consider this for future PCT's.