A 55-year-old man attends his GP for review of elevated blood pressure. Over 6 months he has had three clinic readings: 150/94, 148/92 and 152/96 mmHg. He is a non-smoker with no diabetes or chronic kidney disease. His 5-year absolute cardiovascular risk using the Australian CVD Risk Calculator is 12%. He already follows reasonable lifestyle measures. What is the most appropriate next step in management?