Possible nausea, vomiting, diarrhea, discomfort 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), hyperkalemia (nausea, vomiting, diarrhea, paresthesia), hypermagnesia (facial flushing, thirst, lowering of blood pressure, hyporeflexia, respiratory depression, convulsions).