A total of 4 injections are required for the tetanus shot desensitization injection, which involves combining tetanus antitoxin and saline in different proportions as follows: The first injection involves mixing 0.1 ml of tetanus antitoxin solution with 0.9 ml of saline and then injecting it intramuscularly. Observation is required for 20 to 39 minutes after the first injection, and if there is no other reaction, the second injection is continued. The second injection is made with 0.2 ml of tetanus antitoxin mixed with 0.8 ml of saline. Observation was continued for 20 to 30 minutes after the injection, and if there was still no adverse reaction, the third injection was continued. The third injection is made with 0.3 ml of tetanus antitoxin mixed with 0.7 ml of saline. After the shot, as with the first and second, continue observation for 20 to 30 minutes. If it is normal, proceed to the fourth shot, which is a mixture of 0.4 ml of tetanus antitoxin and 0.6 ml of saline. If you need to have a tetanus desensitization injection, you need to go to a regular hospital and have it done under the guidance of a medical professional.