Although ephedrine can play a role in improving children’s nasal congestion and cough, ephedrine can also cause side effects in children, as follows: 1, it can cause children’s heart to beat faster, because ephedrine is a stimulant drug, which can make children’s heart beat faster, causing children’s panic and other symptoms; 2, it can cause insomnia in children, some children are very sensitive to ephedrine, after the application of drugs containing ephedrine, it will cause insomnia in children; 3, it can cause children’s hyperactivity symptoms aggravated, if children suffer from hyperactivity, after the application of ephedrine will cause excessive excitability of the nervous system, resulting in increased hyperactivity symptoms.