set of the cataplexy.
Schizophrenia. In the presence of florid and vivid hypnagogic hallucinations, individuals
may think these experiences are real—a feature that suggests schizophrenia. Similarly,
with stimulant treatment, pers ecutory delusions may develop. If cataplexy is present, the
clinician should first assume that these sympto ms are secondary to narcolepsy before con-
sidering a co-occurring diagnosis of schizophrenia. 
Comorbidity
Narcolepsy can co-occur with bipolar, depressi ve, and anxiety disorders, and in rare cases
with schizophrenia. Narcolepsy is also associ ated with increased body mass index or obe-