I used both Nolva and Clomid for my PCT. I did 100mg for the 1st 5 days, then 50mg for the next 10 days. (This along with 40mg of nolva for the 1st 15 days, then 20mg for the next 15 days, 30 total for the Nolva, 15 for the Clomid.)
It didn't effect me negatively, but I was also not using 300mg like some people might suggest.
Your mileage may vary, but the stuff is cheap, and if it doesn't make you an emotional mess, it can't hurt to mix it with your nolva. (I gained 16 on cycle, kept about 10 - but it was clearly 6 lbs of water that I lost.)
Bluesman