But wait — aren’t Amanita muscaria mushrooms dangerous? The answer is complicated. Most of the side effects of fly agarics come from another compound present in the fungus called ibotenic acid. This little molecule is the reason these mushrooms are a brilliant red, but also why they sometimes makes people vomit or become comatose. For inquiries related to this message please contact our support team and provide the reference ID below. The common name Magic Mushroom is, of course, a reference to the hallucinogenic nature of this grassland species Mushroom poisoning occurs from toxins found in certain mushrooms. It most commonly occurs after ingesting wild mushrooms that have been misidentified as safe. The symptoms of mushroom poisoning how long magic mushrooms last can vary, as can the severity. While some toxins can cause moderate symptoms like gastrointestinal discomfort, others can be lethal.