Most people who use meth in extended binges hear voices and see things during those binges. These hallucinations lead to extreme anxiety and paranoia. The combination of hallucinations and feelings of fear and paranoia is known as meth-induced psychosis. Meth induced psychosis is caused by meth’s effect on at least three areas of the brain: the visual cortex, the auditory cortex, and the amygdala.
For most people, these psychotic episodes pass when they stop using and get some sleep. In some severe cases, the symptoms can persist for days. In a very few cases, meth-induced psychosis can be longterm and possibly permanent.