General immunity-boosting drugs can cause some of the following hazards if they are applied for too long or in too large a dose: 1. They cause children to suffer from symptoms of fire, because most of the immunity-boosting drugs for children belong to the tonic class of drugs. For example, ginseng, astragalus, etc.. These drugs can cause nosebleeds, sore throats, and even abdominal distension in children if the dose is high. 2. Therefore, the use of drugs to increase immunity must be used under the guidance of a physician.