4176
Two cases of acute dexmedetomidine withdrawal syndrome following prolonged infusion in the intensive care unit : Report of cases and review of the literature .
 Chemical: dexmedetomidine
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: dexmedetomidine 
Answer:
 Chemical: dexmedetomidine