A 19-year-old woman with a 2-year history of auditory hallucinations and social seclusion is commenced on risperidone. 10 days later, she develops severe muscle rigidity and abnormal eye movements. Temperature is 98.9 F. Which of the following is the most appropriate pharmacologic therapy for this patient?
Dantrolene
Diphenhydramine
Dronabinol
Ropinirole
Scopolamine
