A 52-year-old man with a history of depression presents to the emergency department accompanied by his adult children who report that the client is behaving differently than during past episodes. They report he has withdrawn and refuses to speak to anyone. He sits in his recliner all day and stares straight ahead. He has not eaten in two days. His son tried to put a glass of juice in his hand and lift it to his mouth, and the client kept his hand up to his mouth but did not take a drink. His mental status exam is significant for alogia and lack of movement except for purposelessly keeping his right arm up in the air. When the examiner attempts to lower the patient's arm, the client demonstrates slight, even resistance. His only current medication is sertraline 200 mg per day. Which listed action is the best initial step?