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Their combined cardiac toxicity may be due to independent effects of each drug ; however , they may also be due to cocaethylene ( CE ) , a cocaine metabolite formed only in the presence of ethanol .
 Disease: cardiac toxicity; Chemical: cocaethylene; Chemical: CE; Chemical: cocaine; Chemical: ethanol
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:
 Disease: cardiac toxicity; Chemical: cocaethylene; Chemical: CE; Chemical: cocaine; Chemical: ethanol