Frequently (and not so frequently) Asked Questions
BRIEF: Could eating one small bad mushroom poison me?
QUESTON: can eating one bad mushroom cap about the size of a silver dollar still cause me to be poisoned?
Depends on which mushroom it was. Get to a poison center/doctor now, preferably with an example of the mushroom you ate. The sooner the better, some of the worst mushrooms have a delayed effect.