The child has taken 30 vitamin C pills a day, which is an overdose. You can also induce vomiting at home by stimulating the back wall of the throat with your finger or the handle of a spoon until the vomit is clear water, followed by drinking more sugar and salt water and seeking medical attention. If the baby has nausea, vomiting and discomfort, it is recommended to take the child to the hospital in time and give gastric lavage treatment if necessary. Common adverse consequences are as follows: 1, because the child’s liver and kidney function is not fully developed, drug overdose may cause damage to liver and kidney function; 2, excessive oral vitamin C, may cause urate, cysteine salt or oxalate increase, causing the occurrence of stones; 3, the stomach is irritating, is likely to produce a burning situation on the gastric mucosa, resulting in vomiting, stomach pain and other situations; 4, can counteract heparin and The anticoagulant effect of bicoumarin may lead to thrombosis. And if you take a lot of vitamin C for a long time, once you stop taking it, it can cause bleeding or induce scurvy. Vitamin C and other drugs should be placed out of reach of children, and children should be taught patiently not to put things they don’t know in their mouths, and to ask their parents before eating.