Abstract:Objective To investigate the efficacy of liraglutide combined with dapagliflozin in the treatment of overweight and obese patients with type Ⅱ diabetes mellitus (T2DM) and its effects on pancreatic islet function of the patients. Methods A total of 96 overweight or obese T2DM patients who were treated in our hospital from February 2018 to October 2019 were selected, and the patients were randomly divided into the control group (n = 48) and the observation group (n = 48). The control group was treated with liraglutide, while the observation group was additionally treated with dapagliflozin on the basis of the control group. All patients were treated continuously for 12 weeks. Body mass index (BMI), waist circumference, glycated hemoglobin (HbAlc), fasting plasma glucose (FPG), 2h plasma glucose (2hPG), diastolic blood pressure (DBP), systolic blood pressure (SBP), triglyceride (TG), total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), fasting insulin (FINS), 2-hour insulin (2 hINS), homeostasis model assessment of insulin resistance (HOMA-IR), homeostasis model assessment of β-cell function (HOMA-β), insulin sensitivity index (ISI) were recorded before and after treatment, and occurrence of adverse reactions during treatment were recorded. Results The alterations of BMI, waist circumference, HbA1c, FPG and 2hPG before and after treatment in the observation group were significantly greater than those in the control group (P < 0.05), and similar differences were seen in the alterations of DBP, SBP, TG, TC, HDL-C and LDL-C before and after treatment between the two groups (P < 0.05). The differences between the two groups in FINS, 2 hINS, HOMA-IR, HOMA-β and ISI before and after the treatment were statistically significant (P < 0.05) as well, with those of observation group being greater. Besides, there was no difference in incidence of adverse reactions between the two groups during the treatment (P > 0.05). Conclusions Liraglutide combined with dapagliflozin in the treatment of overweight and obese T2DM patients can effectively and safely reduce blood glucose and BMI of patients, relieve hyperglycemic toxicity in patients, regulate glycolipid metabolism, and protect pancreatic islet function, which is of great significance to reduce the weight and therefore to improve efficacy of the treatment for overweight and obesity T2DM patients.