2160
Dexamethasone had no significant effect on the incidence or severity of postoperative nausea and vomiting .
 Dexamethasone, postoperative nausea and vomiting
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Dexamethasone, postoperative nausea and vomiting