Buproprion has raised concerns regarding its potential to induce psychosis due to its dopaminergic effects. In response to these concerns, a 2011 systematic review aimed to assess the risk of bupropion precipitating psychosis. A total of 23 studies, primarily consisting of case studies, were included in the review. Notably, various symptoms associated with bupropion were identified from the included studies, such as perceptual disturbances (e.g., altered time sense, vivid dreaming), as well as psychotic symptoms (e.g., paranoia, delirium, auditory and visual hallucinations, catatonia). These symptoms often emerged at higher doses, with several studies reporting psychosis at doses > 450 mg/day. One case study documented psychosis following an overdose of 4200 mg of bupropion sustained release. Additionally, a study comparing bupropion alone to bupropion combined with haloperidol for treating schizoaffective disorder found that three out of nine patients on bupropion alone experienced psychosis, while none in the combination group did. In cases involving pre-existing substance abuse, such as cocaine, alcohol, or cannabis, bupropion appeared to exacerbate psychosis, suggesting a potential causative role in sensitized individuals. Evidence also suggested that higher levels of bupropion metabolites were associated with adverse outcomes, indicating a possible dose-response relationship. Overall, while bupropion may induce or exacerbate psychotic symptoms in some cases, it was suggested that the evidence is not conclusive and further controlled studies are needed to clarify the risk of bupropion precipitating psychosis. For an overview of the case studies linking bupropion to psychotic symptoms, please refer to Table 1. [1]