Pediatric compound amino acid injection is an injectable compound preparation of 19 amino acids in aqueous solution, which is used for parenteral or gastrointestinal nutrition infusion, and has several applications: first, premature infants and children with low body weight or various causes, who cannot ingest protein by mouth or have insufficient intake; second, children with high metabolic rate due to various traumas, such as burns, trauma, and surgery; third, children with acute or chronic malnutrition who cannot ingest by mouth or have insufficient intake. Thirdly, it is also used for acute or chronic malnourished children who cannot take in protein by mouth or have insufficient intake, such as necrotizing small intestine colitis, acute necrotizing pancreatitis and chemotherapy drug reactions, etc. Pediatric compound amino acid injection is a prescription drug used within the hospital, the patient needs to do is to cooperate with the medical staff to understand the role of the drug after, or observe whether there are some adverse reactions occur, mainly to observe whether the child is stable, if there is a situation in time to communicate with the doctor.