What are the side effects of mixing an antidepressant and an antipsychotic?

Mixing an antidepressant and an antipsychotic can lead to several side effects, including increased sedation, weight gain, and metabolic changes. There may also be a risk of serotonin syndrome, particularly if the antidepressant is a selective serotonin reuptake inhibitor (SSRI). Additionally, the combination can potentially exacerbate movement disorders or lead to other neurological symptoms. It's essential to consult a healthcare professional before combining these medications to monitor for adverse effects.