I take 500Mg of pure Niacin daily.
It lowers my cholesterol by 100 points.
Supposed to be tough on the liver though.
That's the same amount that I take in addition to the Zocor. Thus far I have had no problems and I have a blood workup every six months or so. Everything is within the normal limits. I'd suggest you do the same to be sure.
Do you have any problems taking that much Niacin? Do you take it all at once....just wondering.