What are the harms of high magnesium in children?

Patient's question:

No

Doctor's answer:

Magnesium can inhibit the transmission of excitation at the neuromuscular junction, and high concentrations of magnesium have a curare-like effect. Therefore, patients with hypermagnesemia may experience significant muscle weakness or even flaccid paralysis. The limbs, swallowing, and respiratory muscles can all be affected, which may lead to flaccid quadriplegia, difficulty swallowing and speaking, and in severe cases, death due to respiratory muscle paralysis.