Residual effects
Psilocybin is not addictive, and your body could possibly become more tolerant of effects. Psilocybin can increase the severity of any already existing mental health issues. It has low level toxicity, but it is near impossible to consume enough for a fatal overdose. However, by consuming consistent, frequent amounts of psilocybin, you can cause permanent changes to your body. It is possible to permanently damage your perception of time, as well as causing lasting twitches and convulsions. It is also possible to induce a schizophrenia-like psychosis with effects including paranoia, confusion and derealization/disconnection from reality.