The most commonly reported negative side effect of taking magic mushrooms is having a bad trip. This might involve unpleasant physical symptoms such as nausea, chills, vomiting, or headaches. The user might also experience negative psychological effects such as paranoia, anxiety, or even extreme terror.
“Psychological distress is the most common adverse effect reported after use of psilocybin. This can range from a ‘bad trip’ to disturbing hallucinations that can last for days,” Dr. Lawrence Weinstein, chief medical officer of American Addiction Centers, told INSIDER.
Under normal circumstances, the mind-altering effects of psilocybin-containing mushrooms usually last from six to eight hours depending on dosage, preparation method, and personal metabolism. The first three to four hours of this period are usually the most intense. However, the effects can seem to last much longer to the user because of psilocybin’s ability to alter time perception, according to Dr. Weinstein.
The way you feel while under the effects of magic mushrooms can be affected by a number of things, including the dose, your environment, who you are with, and what your mood or mental state was like before taking mushrooms. Being in a fearful or gloomy state of mind before taking psilocybin mushrooms may intensify any negative feelings you already have, leading to a bad trip.