Which medication is indicated for treating schizophrenia and is associated with weight gain?

Olanzapine is an atypical antipsychotic medication that is commonly used to treat schizophrenia. One of its notable side effects is significant weight gain, which can occur in many patients using this medication. This weight gain phenomenon is thought to be due to olanzapine's effects on appetite regulation and energy metabolism.

A number of studies have demonstrated that patients on olanzapine often experience increased appetite and subsequent weight gain compared to other antipsychotics. This is an important consideration in the management of patients with schizophrenia, as excessive weight gain can lead to additional health concerns such as diabetes and cardiovascular diseases.

Risperidone, quetiapine, and lithium, while useful in the treatment of schizophrenia and other psychiatric conditions, do not show the same propensity for weight gain as prominently as olanzapine. Although risperidone and quetiapine can also cause weight gain, it is generally less severe compared to the effect seen with olanzapine. Lithium, primarily used for mood stabilization, is not typically indicated for schizophrenia. Therefore, olanzapine is the most recognized medication in this group associated with weight gain while effectively treating schizophrenia.