An 83-year-old man with a history of schizoaffective disorder presents with his spouse for bizarre behavior. The patient usually manages his own medications, but his spouse notes he ran out of medications several days ago. The patient’s vitals are unremarkable. The patient is unable to offer a coherent history and is pacing back and forth in his room saying, “They are coming to take me away.” Verbal redirection and a low-stimulus environment do not calm the patient. Which of the following is the most appropriate next step in management of this patient’s agitation?