Description

Addonizio et al reported criteria for the diagnosis of the neuroleptic malignant syndrome.


 

Major criteria:

(1) temperature >= 99.0 °F (37.2°C)

(2) severe rigidity or tremors (extrapyramidal signs or EPS)

 

Minor criteria:

(1) tachycardia (>= 100 beats per minute)

(2) hypertension (>= 150/100 mm Hg)

(3) sweating (diaphoresis)

(4) leukocytosis (> 10,800 per µL)

(5) confusion or altered consciousness

(6) incontinence

(7) elevated serum CK (> 83 IU/L)

 

High probability of NMS:

(1) 2 major criteria AND 3 minor criteria within 48 hours

 

Probable NMS - one of the following:

(1) 2 major criteria AND >= 1 minor criteria within 48 hours

(2) 1 major criteria AND >= 3 minor criteria within 48 hours

 


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