I took Miralax too regular for several years and now on natural prune juice, but my problems lately have been nausea and dizzyness. I have had all the necessary blood tests, stress test and will see the doctor who did my hearing Cochlear right implant this week. The dizzyness causes me to be very cautious driving. I am 87 years, half thyroid removed in my 40's. Thyroid blood test taken this morning. Take low blood pressure medicine, that is all. Thank you!