1742
Administration of aprotinin should be avoided in coronary artery bypass graft and high risk patients , whereas administration of tranexamic acid is not recommended in valve surgery .
 Chemical: tranexamic acid
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: tranexamic acid