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Although verapamil reduced the bufadienolide - induced ventricular arrhythmias , verapamil worsened heart block and lethal bradycardia of bufadienolides partly via increasing the uptake of bufadienolides in heart tissue , which could compromise the protective effects of verapamil against bufadienolide intoxication .
 Chemical: verapamil; Chemical: bufadienolide; Chemical: verapamil; Chemical: bufadienolides; Chemical: bufadienolides; 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; Chemical: verapamil; Chemical: bufadienolides; Chemical: bufadienolides; Chemical: verapamil; Chemical: bufadienolide