What Are the Side Effects of Potassium and Magnesium Supplements?
Possible side effects of potassium and magnesium supplements include: • Nausea, vomiting, diarrhea, and abdominal discomfort. Take the medication with or right after meals with a full glass of water or fruit juice. If these side effects continue, contact your doctor. If you take controlled-release tablets or capsules and experience severe vomiting or vomit blood and abdominal pain or swelling, stop taking the medication and contact your doctor right away. • Black, tarry, or bloody stools (signs of stomach bleeding). Contact your doctor right away. • Confusion; irregular or slow heartbeat; numbness or tingling in hands, feet, or lips; shortness of breath or difficult breathing; unexplained anxiety; unusual tiredness, or weakness. Contact your doctor right away.
