"Actually, I think you shouldn't use Nolvadex at all. Again, estrogen in the right amounts is your friend.
But, if you insist on using an anti-estrogen, IMO, the best product to use to combat estrogen and all of its effects is Letrozole (femara). This is a Type 2, anti-estrogen and from what I've seen in the various studies, is the best. The normal dosage is 2.5mg/day.
The Type one anti-estrogen products where developed first and are drugs such as nolvadex and clomid. They simply compete with estrogen for the estrogen receptor sites and reduce estrogens effects that way.
The Type two products are those like arimidex (anastrozole) and Letrozole. They actually prevent the aromatase enzyme from converting excess testosterone to estrogen. That's generally considered better than simply blocking the receptors.
For our purposes, the product letrozole is probably the best because in addition to estrogen prevention, some studies have indicated that Letrozole may actually increase IGF-1. Whereas some studies have indicated products like nolvadex and arimidex may decrease IGF-1. "
Here is a little more info i got for you.