Potassium & Magnesium Citrate

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Potassium and magnesium citrate are of vital importance to your cardiovascular and central nervous systems. Magnesium citrate acts as a laxative by increasing water concentration within the intestines. Potassium is useful in regulating heart rate. Potassium and magnesium citrate are available in supplement form. Seek medical advice before taking these supplements in order to lower your risk of adverse reactions.

Recommended Use and Precautions

Avoid taking potassium supplements if you suffer from hyperkalemia, or high blood potassium. For best results, take potassium during a meal or within 30 minutes after eating. Never chew, crush or suck on potassium citrate tablets because doing so will cause irritation of your mouth and throat. Take magnesium citrate on an empty stomach followed by a glass of water. Refrain from taking magnesium citrate if you are experiencing abdominal pain or vomiting, as the supplement will often worsen these symptoms.

Side Effects

Potassium and magnesium citrate cause side effects such as stomach upset and nausea. Potassium citrate also causes muscle weakness and arrhythmia. Other side effects of potassium citrate include chest pain and diarrhea. Some serious side effects of potassium include feeling faint, confusion, black, bloody or tarry stools. Magnesium citrate causes similar side effects and also impairs normal bowel response if used on a long-term basis. High levels of potassium and magnesium sometimes causes lightheadedness and dizziness. Both potassium and magnesium might cause extreme allergic reactions such as impaired breathing, closing of the throat and swelling of the facial area.

Blood Pressure Effects of Potassium and Magnesium Citrate

Both supplements affect your blood pressure. Avoid taking potassium if you are allergic to it. There is some evidence that suggest that potassium potentially helps lower blood pressure, the University of Maryland Medical Center notes. However there is insufficient data to conclusively validate this assertion. Magnesium citrate elevates blood pressure due to increased fluid retention. Magnesium citrate also causes an elevation in magnesium and potassium levels, especially if you suffer from kidney disease.

Possible Interactions

Potassium and magnesium citrate impair the function of blood pressure medications such as blood thinners and phenothiazines, the American Cancer Society notes. Potassium decreases the efficacy of bladder medications such as darifenacin and flavoxate, according to Drugs.com. Antibiotics such as tetracycline, ofloxacin and nitrofurantoin are unable to fully activate when combined with potassium or magnesium. Take magnesium supplements at least two hours after taking these medications in order to lower your risk of adverse interactions.