The majority of people working with extremely large doses above various days or perhaps weeks become confused and psychotic since amphetamines may cause significant anxiety, paranoia, and also a distorted perception of actuality.ch?t gây nghi?n – nh?ng ch?t tác ??ng vào h? th?n kinh trung ??ng, gây bi?n ??i các ho?t ??ng ch?c n?ng c?a h? th?