In 2001, I had to leave work after eating black walnuts. I couldn't breathe! I wasn't sure I wasn't headed for the ER, but I got over it.
I've taken gallons of Dewormer without a bit of problem. Somebody told me the black dusty part of the inside of the shell and is on the nut is the problem part. It's not what you're getting in parasite cleansing.