Why does quatiapene cause weight gain?

Quetiapine can cause weight gain primarily due to its effects on appetite regulation and metabolism. It acts on various neurotransmitter receptors, including histamine and serotonin receptors, which can increase appetite and lead to higher food intake. Additionally, quetiapine may alter metabolic processes, contributing to weight gain over time. These side effects are common in many atypical antipsychotic medications.