A 30 year old man who was recently started on haloperidol 30 mg/day developed hyperpyrexia, muscle rigidity, akinesia, mutism, sweating, tachycardia and increased blood pressure.The investigation showed increased WBC count, increased creatinine phophokinase.These is no history of any other drug intake or any signs of infection.The most likely diagnosis is -

A 30 year old man who was recently started on haloperidol 30 mg/day de

1.	A 30 year old man who was recently started on haloperidol 30 mg/day developed hyperpyrexia, muscle rigidity, akinesia, mutism, sweating, tachycardia and increased blood pressure.The investigation showed increased WBC count, increased creatinine phophokinase.These is no history of any other drug intake or any signs of infection.The most likely diagnosis is -
A.	Neuroleptic malignant syndrome
B.	Drug overdose
C.	Tardive dyskinesia
D.	Drug induced Parkinsonism
Answer» B. Drug overdose