Blood pressure meds lower the pressure in many different ways. Some slow the heart rate, some are vaso dilators and some increase urine output. Your side effects should go away in time, if not, ask to switch to a different acting one. You got some excellent advice here - eating whole foods and exercising and maintaining a normal weight. I've been on bp meds for a long time. If you happen to be genetically inclined to have high bp like I am there isn't much you can do. Sodium has been blamed for a long time but there's always studies showing the opposite so who can tell about that? Good luck and I hope you get it figured out and back to riding soon.