15719
The hemoglobin A1c ( HbA1c ) of all patients improved significantly from 8 . 1 +/- 1 . 2 % to 7 . 6 +/- 1 . 1 % after 12 weeks of add - on therapy with sitagliptin ( p < 0 . 01 ) , and the insulin dosage was reduced from 27 . 3 +/- 15 . 8 U / day to 24 . 5 +/- 16 . 5 U / day ( p < 0 . 001 ) .
 Chemical: sitagliptin
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: sitagliptin