A client with schizophrenia is prescribed olanzapine. During a follow-up visit, the client reports increased appetite and weight gain. Which nursing action is most appropriate to address this concern?

Explain that weight gain is an expected effect of the medication.

Instruct the client to stop taking the medication until they can be reevaluated.

Suggest the provider change to a first-generation antipsychotic.

Recommend switching to a low-calorie diet and increasing physical activity.