Originally Posted by
Hoyaheel
The niacin I take gives me terrible heartburn -I just take an acid reliever for it (I already take it after dinner so I have a full stomach, and with aspirin to prevent flushing, and at night in case I do flush

)
So, I guess taking with food would be my first recommendation. If you're already doing that....Look for enteric coated versions?
I already take them with food, so I'm thinking it's probably one of the fillers.