11735
BACKGROUND : Two clinical trials have shown that users of 5 alpha - reductase inhibitors finasteride and dutasteride ( 5 - ARIs ) have reduced overall prostate cancer risk , while the proportion of high - grade tumors is increased .
 Chemical: finasteride; Chemical: dutasteride
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: finasteride; Chemical: dutasteride