Effects of dapagliflozin on blood pressure in hypertensive diabetic patients on renin–angiotensin system blockade
Hypertension and type 2 diabetes mellitus (T2DM) are risk factors for cardiovascular disease. Dapagliflozin improves glycemic control and systolic blood pressure (SBP) in T2DM patients. This double-blind phase III study evaluated the effects of dapagliflozin on glycemic control and blood pressure in patients with inadequately controlled T2DM and hypertension, despite ongoing therapy with a renin–angiotensin system blocker. Patients were randomized to receive dapagliflozin 10 mg (n = 302) or placebo (n = 311) once daily for 12 weeks. Endpoints were change from baseline to week 12 in seated SBP and glycosylated hemoglobin (HbA1c); longitudinal repeated-measures analysis was performed. Additional endpoints included other hemodynamic measures, serum uric acid, fasting plasma glucose, body weight, blood lipids and heart rate. After 12 weeks, dapagliflozin-treated versus placebo-treated patients showed significant reductions in HbA1c (–0.6% vs –0.1%, p < 0.0001), mean seated SBP (–10.4 vs –7.3 mmHg, p = 0.0010) and mean 24 h ambulatory SBP (–9.6 vs –6.7 mmHg, p = 0.0043). Dapagliflozin also reduced body weight compared with placebo (–1.0 vs –0.3 kg). Dapagliflozin was well tolerated, with adverse events consistent with previous studies. Dapagliflozin improved glycemic control, and reduced SBP as well as body weight in patients with poorly controlled T2DM and hypertension.