[…] generalized destruction of cells, followed by organ failure Neurotoxins* ; Compounds that cause neurological symptoms such as profuse sweating, coma, convulsions, hallucinations, excitement
[meddev.uio.no]
[…] is soon followed by nausea, vomiting, diarrhea, excessive salivation, perspiration, watering of the eyes, slowed and difficult breathing, dilated pupils, confusion, and excitability
[britannica.com]
Its effect on the brain excites neural transmitters causing the hallucinogenic effects, which are very unpredictable and will differ from person to person.
[mushroomdiary.co.uk]