The nurse is caring for a client with a diagnosis of paranoid schizophrenia. They are speaking to the client about their medication regimen. They have decided to refuse continuation of risperidone, an antipsychotic used to treat their positive schizophrenic symptoms. The client expresses that they believe that the medications are poisonous, and the doctors are attempting to "kill them off" by prescribing the drug. What is the most appropriate action for the nurse to take?