Hello and welcome to Healthcare Magic. Thanks for your query.
Magic mushrooms (Psilocybin) can cause a variety of psychiatric problems like anxiety
disorders, psychotic disorders, etc. They can also exacerbate underling dormant psychiatric conditions. Your brother needs a detailed psychological assessment to arrive at a diagnosis and further treatment will be based accordingly. I would strongly advise you to take him or encourage him to go to a psychiatrist
for further evaluation and treatment.
Wish you all the best.
- Dr. Jonas Sundarakumar