The use of C immunoglobulin is generally intravenous drip or intramuscular injection, the dose is generally based on kilograms of body weight to calculate, mostly 200 to 400 mg / kg per day, the course of treatment is generally 2 to 5 days, depending on the disease to determine the specific time. It is mostly used for severe infections, people with severe autoimmune deficiency and autoimmune diseases. Gammaglobulin contains a variety of antibodies, can effectively improve the body resistance, and combined with antibiotics, can effectively improve the efficacy of bacteria and viruses, so it is often used for severe infections, sepsis patients, usually 200~300mg/kg per day, the course of treatment is usually 2~3 days. Gammaglobulin has the role of immune replacement and regulation, can be used to treat autoimmune diseases, such as primary thrombocytopenia, connective tissue disease activity, etc., usually 400mg/kg per day, the course of treatment is usually 5 days. Primary immunoglobulin deficiency, need to be infused with gammaglobulin to improve body resistance, usually 200-300mg/kg per day, the course of treatment is usually once a month. Adverse reactions such as allergy, fever and panic may occur during the infusion of gammaglobulin. It is contraindicated in those who are allergic to human immunoglobulin or have a history of other severe allergies, and those with selective IgA deficiency with anti-IgA antibodies. Note that different agents are used in different ways, and the drug should not be used if it appears cloudy, precipitated or foreign. C-immunoglobulin should be used under the supervision of a doctor, avoid self-medication.