21521
RESULTS : The pooled analysis included 4168 patients exposed to alogliptin 12 . 5 and 25 mg daily for 2023 patient - years compared to 691 patients treated with placebo for 263 patient - years and 1169 patients treated with other antidiabetic agents ( metformin , sulfonylureas and thiazolidinediones ) for 703 patient - years .
 alogliptin, metformin, sulfonylureas, thiazolidinediones
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 alogliptin, metformin, sulfonylureas, thiazolidinediones