Tetanus antitoxin is an antiserum that has been produced by actively immunizing an animal (e.g., a horse) with tetanus toxoid. When a human may have been exposed to spores of the tetanus bacillus (e.g. in a dirty puncture wound) and has never or not for a long time (10 years) been actively immunized with tetanus toxoid, the physician, fearing that disease symptoms may occur before the patient is able to mount an active immune response, will inject tetanus antitoxin in order to provide immediate protection. The protection is short-lived, lasting only until the last of the injected antibodies have been catabolized. [Ingredients]Horse tetanus immunoglobulin following pepsin digestion [Pharmacological action]The product contains specific antibodies which have the power of neutralizing tetanus toxins. [Specifications]2500IU/ml, 3000IU/ml, 3500IU/ml, 4000IU/ml [Packages]10Liters/Bottle, 1Bottle/Carton