Maybe you should try just a little in your food, and if it doesn't bother the baby, keep adding a little more at a time until you get to the amount you want to take.
I'm nursing and I eat cayenne whenever I get the chance! I haven't tried a whole capsule of it, although I had some really spicy Thai food the other night and it didn't seem to bother my baby. I always figure that babies born in cultures where they always eat spicy food, like Thailand or India or Ethiopia, or a bunch of others, have to get used to it somehow. They probably taste it in the womb and then in the breastmilk and then they're able to eat it when they wean. So I just eat as much as I can get away with putting in my family's food. A lot of those places have to make their food spicy, just to kill all the bacteria that's been growing on the meat while it hangs out in the sun.