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In the present of verapamil , the wide QRS duration and lightly rapid heart rate ( HR ) were markedly reduced in the early stage of bufadienolide intoxication .
 Chemical: verapamil; Chemical: bufadienolide
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: verapamil; Chemical: bufadienolide