Cook them first mate, low heat will not remove the active chem and it will make them digestible.
Don't eat and citrus fruits or drinks 12 hours leading upto eating mushrooms or 12 hours after it will not help your gut if citrus is involved
I have read that if you soak some ground mush in lime juice it does a nice job of taking away the stomach nausea. I have yet to try it so I cannot say for sure, but I know it was stated by someone here who I feel knows a great deal. For some reason I want to say Golly, but maybe TasteyBeverage had written that.