A total of 30 participants will be recruited. Participants will be assigned to one of two groups: high-dose, in which subjects will receive treatment of 200 mg/day of losartan, and low-dose, in which subjects will receive treatment of 50 mg/day of losartan. Via microneurography the investigators will measure the difference in sympathetic activity in subjects in high-dose vs low-dose losartan. The investigators expect to see further decrease in sympathetic activity in high-dose group than in low-dose group.