23120
Intraperitoneal or intracerebroventricular , but not intrathecal , pretreatment with naloxone suppressed the renal ischemia / reperfusion - induced increases in BUN and plasma creatinine .
 naloxone, creatinine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 naloxone, creatinine