Because the body excretes excess magnesium, overdosing in healthy people is basically impossible. Nevertheless, there may be side effects such as loose stools or diarrhea – this can be avoided if the magnesium intake occurs distributed in small doses over the day. People with severe kidney disease or kidney failure should consult their physician before taking the essential preparations. Also, because it may interact with certain medications. Magnesium is injected into the muscle or given through the vein, a dangerous overdose can occur. Therefore, this form of magnesium application should perform only the doctor.