How do i decrease my potassium levels. renal and heart patient, am following a low potassium diet from dietician but potassium levels are stilll high?

Low potassium: Magnesium deficiency can cause low potassium, so I recommend taking a magnesium supplement containing 3 different forms of magnesium. You might also consider taking a low dose of hydrochlorothiazide as long as it doesn't make your renal function worse. Lasix would be better if you also have any evidence of CHF. Both drugs lower potassium.