23898
OBJECTIVEExamine the efficacy and safety of lixisenatide ( 20 mu g once daily , administered before the morning or evening meal ) as add - on therapy in type 2 diabetes patients insufficiently controlled with metformin alone . RESEARCH DESIGN AND METHODSA 24 - week , randomized , double - blind , placebo - controlled study in 680 patients with inadequately controlled type 2 diabetes ( HbA1c 7 - 10 % [ 53 - 86 mmol / mol ] ) .
 Chemical: metformin
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: metformin 
Answer:
 Chemical: metformin