I hesitated to answer this question cause I know others can probably give a better answer, but here's what I've been tought. When you have any signs of gyno and all you have is nolva:
60mg for first 3 days
40mg ED until symptons subsude
20mg ED for duration of cycle
But get letro (or some ai of that nature) ASAP, if you have gyno symptoms, cause nolva aint the best for prevention of gyno.
Best Of Luck!