Tetanus is caused by the bacterium Clostridium tetani. If it gets into the body through a wound, it grows and produces a powerful toxin that affects the nervous system (neurotoxin). Symptoms include muscle stiffness and spasms. The jaw can get locked in position ("lockjaw") and breathing can become a problem. Immunisation against tetanus is carried out in infancy. Tetanus immunoglobulin is used for the prevention of tetanus in a person who has not been recently immunised and who has suffered an injury that could put them at risk of exposure to the tetanus bacteria. It is also used for treatment of clinical tetanus to bind any unbound neurotoxin.

Tetanus immunoglobulin can only be obtained with a doctor's prescription. Discuss with your doctor why it has been prescribed for you and the benefits and risks of this medicine.