Human immunoglobulin is not indicated for patients with hypersensitivity to human immunoglobulin or a history of other severe allergies and for patients with selective lgA deficiency in the presence of anti-lgA antibodies. Human immunoglobulin is an agent that can be used in autoimmune diseases, secondary immunoglobulin deficiency diseases and primary immunoglobulin deficiency. Contraindications to the drug are hypersensitivity to human immunoglobulin or the presence of a history of other severe allergies and selective lgA deficiency with anti-lgA antibodies; human immunoglobulin injections are not recommended for patients with contraindications to the drug. In addition, women during pregnancy and women who may become pregnant should be treated with caution with this medication, and if human immunoglobulin injections are required due to a medical condition, they should be used under the close observation of a physician. Human immunoglobulin generally has no adverse effects, but individual patients may experience nausea and headache after injection. Note that the drug solution should not be used if it shows turbidity, precipitation, foreign matter or if the bottle is cracked or expired. It should be used with caution in patients with severe acid-base metabolic disorders. Human immunoglobulin should be used under the guidance of a physician, and it is recommended that patients who need to use human immunoglobulin for treatment go to the relevant departments of regular hospitals for detailed consultation.