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The induction of doubt and the dampening of emotion may be one reason why antipsychotics work and at the same time offer an explanation why they are experienced as rather unpleasant and are eventually discontinued by many patients .
 None
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:  
Answer:
 None