898
Flumazenil ( mean dose , 0 . 76 mg ) or placebo ( mean dose , 8 . 9 ml ) was administered intravenously to 130 and 67 patients , respectively , who had been given diazepam in conjunction with an opioid ( fentanyl , meperidine , or morphine ) for the induction and maintenance of intravenous conscious sedation for diagnostic or therapeutic surgical procedures .
 Chemical: Flumazenil; Chemical: diazepam; Chemical: fentanyl; Chemical: meperidine; Chemical: morphine
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: Flumazenil; Chemical: diazepam; Chemical: fentanyl; Chemical: meperidine; Chemical: morphine