14978
The use of a combination of a serotonin 5 - HT3 receptor antagonist , dexamethasone and a neurokinin 1 ( NK1 ) receptor antagonist has significantly improved the control of acute and delayed emesis in single - day chemotherapy .
 Chemical: serotonin; Chemical: dexamethasone
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: serotonin; Chemical: dexamethasone