An otherwise healthy 54-year-old man attends a rural family practice clinic for follow-up of elevated blood pressure. Using proper technique, his automated office readings over 3 separate visits are: 150/92 mm Hg, 146/90 mm Hg and 148/94 mm Hg. He has no diabetes, chronic kidney disease or target-organ damage, and ambulatory or home blood pressure monitoring are not available in his community. What is the most appropriate next step in management?