A 45–year–old male, Sanjeev was brought to the emergency with severe agitation and aggressive behavior. He was started on haloperidol and the patient became responsive and cooperative. After 8 days of treatment, he developed high-grade fever, diarrhea, confusion, and muscle rigidity. Which of the following should be used for the treatment of this condition?
Diazepam
Benzhexol
Dantrolene
High dose of haloperidol