At this time, no effective antidote for mushroom poisoning in humans exists. The toxins produced by mushrooms accumulate in the liver and lead to irreversible liver damage. Unfortunately, it’s possible that no indication of poisoning will happen for several hours after ingesting a toxic mushroom. When the symptoms do present, they often resemble typical food poisoning. Liver failure becomes apparent three to six days after ingesting a poisonous mushroom, with the only solution usually being an eventual liver transplant.