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We compared the effects of single doses of 50 mg atenolol ( cardioselective ) , 40 mg propranolol ( nonselective ) , and placebo on both exercise - and isoproterenol - induced tachycardia in two experiments involving nine normal subjects .
 Chemical: atenolol; Chemical: propranolol; Chemical: isoproterenol; Disease: tachycardia
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: atenolol; Chemical: propranolol; Chemical: isoproterenol; Disease: tachycardia