[meowface]

I agree, I get the impression that this was a temporary psychotic episode possibly triggered through sleep deprivation, heavy use of cannabis, and maybe some underlying mental condition. Schizophrenia is typically a very chronic condition and doesn't manifest as only one psychotic episode per year.

I'm no doctor, psychiatrist, or psychologist, but I think his diagnosis is probably closer to "psychosis not otherwise specified".

However, he did mention that he is still taking the anti-psychotic medication, which can indeed inhibit the effects of schizophrenia for a long period of time. If he stops taking the medication and encounters psychotic symptoms again, then it probably is schizophrenia or similar.