581
Both patients were treated preoperatively with beta - adrenergic antagonist medications , which may have masked the cardiovascular signs of the unintentional intravascular administration of levobupivacaine with epinephrine .
 Chemical: levobupivacaine; Chemical: epinephrine
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: levobupivacaine; Chemical: epinephrine