I was prescribed potassium yesterday and instructed to take it immediately at 3:00, another tablet with dinner and then again this morning with breakfast. Going forward, twice a day, breakfast and dinner. I already take lisinopril, 1 tablet daily of 20/25 with HCTZ and one table daile of 10 mg. vI have been dizzy and lightheaded today. When I ate lunch today, the symptoms went away. What do you think?