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The possible utility of chronic CBZ in preventing the development of toxic side effects in human cocaine users is suggested by these data , but remains to be directly evaluated .
 Chemical: CBZ; Chemical: cocaine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: CBZ; Chemical: cocaine