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Classical antipsychotics , e . g . haloperidol , chlorpromazine , are potent at controlling the positive symptoms of schizophrenia but frequently elicit extrapyramidal motor side - effects .
 Chemical: haloperidol; Chemical: chlorpromazine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: haloperidol; Chemical: chlorpromazine