The answer
Not at all. schizophrenia is a psychological disorder whereby there is a schism between the mind and the emotions, whereas, being possessed relates to spiritual disorders.
H.G. Bishop Moussa
H.G. Bishop Moussa · Youth Concerns · 102
Faith Q&A › Youth Concerns › Social, Contemporary, and general issues
Is there any relationship between schizophrenia and being possessed?
H.G. Bishop Moussa, Bishop of Youth, Youth Concerns (Questions & Answers). Compiled by Lisa Agaybi. Coptic Orthodox Patriarchate, Bishopric of Youth Bookstore.