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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 .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None