Amino acids are administered intravenously in a volume of 250 to 500 milliliters a day. The exact dosing regimen should be determined by the physician based on the patient’s condition. Amino acid intravenous preparations are available in a variety of drug types such as those containing 18 amino acids, 9 amino acids, 3 amino acids, etc. They are mainly used to provide energy for the human body or may be used in the treatment of specific diseases, such as hepatic encephalopathy. The common dosage is 250 to 500 ml per day intravenously, but the specific dosage regimen should be determined by the physician according to the patient’s condition. Intravenous injection of amino acids may cause fever, nausea, vomiting, palpitations (rapid heartbeat, often accompanied by panic), discomfort at the injection site, phlebitis, and other adverse reactions, and contraindications are related to different amino acid injection types. Note that the drip rate should not be too fast, if any adverse reaction occurs after the use of the drug should be discontinued promptly.