In this difficult-to-treat population, Rasilez HCT provided a blood pressure reduction (systolic/ diastolic) of 15.8/ 11.9 mmHg compared to 15.4/ 11.3 mmHg for irbesartan/ hydrochlorothiazide, 13.6/ 10.3 mmHg for amlodipine/ hydrochlorothiazide and 8.6/ 7.9 mmHg for hydrochlorothiazide monotherapy, with similar safety to hydrochlorothiazide monotherapy.