4683
A 41 - year - old woman with a strong history of postoperative nausea and vomiting presented for abdominal hysterectomy 3 months after a previous anaesthetic where ondansetron prophylaxis had been used .
 Disease: postoperative nausea and vomiting; Chemical: ondansetron
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:
 Disease: postoperative nausea and vomiting; Chemical: ondansetron