The effect of proton pump inhibitors on glycaemic control in diabetic patients

Objective: This study aimed to evaluate the effect of proton pump inhibitors on glycaemic control amongst diabetic patients taking anti-diabetic medications. Methods: This randomised interventional clinical study was conducted in Basic Medical Sciences Institute, Jinnah Postgraduate Medical Centre, Karachi. Eighty patients of either sex (aged 30–60 years) with type 2 diabetes mellitus and without any known comorbidities were equally divided into two groups (i.e., n = 40 for each group) and were included in this study. Group A received metformin and glimepiride, while Group B, metformin and glimepiride plus omeprazole. The efficacy of the combination medications was evaluated based on fasting blood sugar (FBS) and glycosylated haemoglobin (HbA1c) levels. Serum creatinine and liver function tests were reviewed to evaluate patients' safety profile at the initial visit and after 12 weeks. Results: After 12 weeks of omeprazole therapy, we observed a more significant improvement in glycaemic control in group B compared to group A based on the patients' FBS (108 ± 2.37 vs. 126 ± 2.9, P = 0.001) and HbA1c levels (7.29 ± 0.07 vs. 7.47 ± 0.04, P = 0.030). Conclusion: The addition of a proton pump inhibitor along with anti-diabetic medications was considered effective in achieving better glycaemic control.