There may be nausea, vomiting, diarrhea,unpleasant sensations or burning sensation in the epigastric region (in patients with an anatomic gastritis or cholecystitis), atrioventricular blockade, paradoxical reaction (increase in the number of extrasystoles). K + salts: paresthesia, lowering blood pressure, phlebitis, vein thrombosis; hyperkalemia; dyspnea; diarrhea, nausea, vomiting; abdominal pain, ulceration of the mucous membrane of the gastrointestinal tract, bleeding from the digestive tract, flatulence; muscle weakness; itching.
Salt Mg2+: fatigue, hyporeflexia; dizziness; decrease in blood pressure, bradycardia; dyspnea; diarrhea, dry mouth, nausea; hyperhidrosis, sweating.