OBJECTIVE: The aim of the present study was to gain more insight into the positive and negative effects of cannabis in the prodromal phase of schizophrenia and in the ultra-high-risk (UHR) state for psychosis. METHOD: A theory-driven questionnaire was used to examine subjective effects in the prodromal phase in male subjects with a recent onset of schizophrenia or related disorder (n = 52) and...
Cannabis use is the most commonly abused illicit substance. Its relation with psychosis remains a topic of debate. Epidemiological studies suggest that cannabis is a component cause accounting for approximately 10% of cases. An increasing number of studies have been published on neurobiological effects of cannabis and vulnerability of psychosis. Acute cannabis administration can induce memory...
As detailed elsewhere in this book (Chapter 3), cannabis has been used for centuries to produce euphoria and relaxation as desired mental effects. However, adverse effects of intoxication with cannabis include anxiety and panic (Thomas, 1996; Reilly et al. , 1998), depression (Bovasso, 2001; Patton et al. , 2002: see Chapter 4), and impairment in certain domains of cognitive function (see...