Why should tetanus needle do allergy test

Tetanus injection must be done before the skin test. Generally, after soft tissue damage, you need to inject tetanus antitoxin. This drug is actually extracted from animal serum, belonging to heterogeneous protein, there is a possibility of allergic reaction. Before injection, you need to do a skin test. If the result of the skin test is negative or positive, you can choose the injection method. If the result of the skin test is negative, it proves that there is no allergy to tetanus injection. You can directly inject. If the result of the skin test is positive. If the patient is allergic to tetanus shots, desensitization injections are required. If the skin test is positive, tetanus immune globulin can also be injected without skin test. The best time for tetanus antitoxin injection is within 24 hours after injury. If conditions do not allow. It can also be injected within 48 hours. For safety reasons, doctors may be prepared with epinephrine and other rescue drugs.