In patients who did not adequately respond to 5 mg of the calcium channel blocker amlodipine, the addition of Sprimeo 150 mg had a blood-pressure-lowering effect similar to that obtained by increasing amlodipine dose to 10 mg, but had a lower incidence of oedema (aliskiren 150 mg/ amlodipine 5 mg 2.1% vs. amlodipine 10 mg 11.2%).