Safety and efficacy of tofogliflozin in Japanese patients with type 2 diabetes mellitus in real‐world clinical practice: Results of 3‐month interim analysis of a long‐term post‐marketing surveillance study (J‐STEP/LT)

AIMS/INTRODUCTION: The present study analysis was carried out to evaluate the safety and efficacy of tofogliflozin, a sodium–glucose cotransporter 2 inhibitor, in Japanese patients with type 2 diabetes mellitus in real‐world clinical practice. MATERIALS AND METHODS: This was a 3‐year non‐interventional observational study of patients with type 2 diabetes mellitus newly administered tofogliflozin who were uncontrolled on current therapy. We carried out a 12‐week interim analysis of tofogliflozin as part of 3‐year post‐marketing surveillance study. The incidence of adverse drug reactions was evaluated as a safety end‐point. As efficacy end‐points, glycated hemoglobin and bodyweight were evaluated. RESULTS: A total of 6,897 patients were enrolled. Tofogliflozin significantly reduced mean changes from baseline glycated hemoglobin (−0.63%, P < 0.0001) and bodyweight (−2.02 kg, P < 0.0001). The change in glycated hemoglobin and bodyweight reductions in response to tofogliflozin was consistently observed in all body mass index subgroups. Adverse drug reactions occurred in 345 of 6,712 patients (5.14%). There was a low incidence of adverse drug reactions known to be associated with sodium–glucose cotransporter 2 inhibitors, and they were reported as non‐serious. The incidences of polyuria/pollakiuria were higher in patients aged ≥65 years than <65 years, and were significantly different among estimated glomerular filtration rate subgroups. Urinary tract and genital infections occurred more frequently in women than in men. CONCLUSIONS: Tofogliflozin was well tolerated, and no emerging new safety concerns were observed. Tofogliflozin significantly improved glycemic control with no impact on bodyweight gain. The short‐term administration of tofogliflozin is considered to have a favorable benefit–risk profile in Japanese patients with type 2 diabetes mellitus.