There are no specific side-effects associated with the ingredients in Children’s MigreLief and childhood use. But with that said, both dietary supplements and medicines can cause gastrointestinal upset in susceptible users.
Also though the dosage of magnesium in Children’s MigreLief is lowered to reflect the needs of children, in sensitive users magnesium can cause transient diarrhea, which should resolve in 1-3 days. This is why we suggest you start with just one Children’s Migrelief for the first few days and then increase the dosage to two caplets per day.