Ready-made antibodies for tetanus-prone wounds
Tetanus immunoglobulin
Ready-made antibodies given by injection to provide immediate protection against tetanus after a tetanus-prone wound.
What is Tetanus immunoglobulin?
Tetanus immunoglobulin is a blood product containing ready-made antibodies against the tetanus toxin. It is given by injection to provide immediate protection after a wound that carries a risk of tetanus, particularly when someone is not fully vaccinated or the wound is high-risk. It works straight away but the protection is short-lived, so it is often given together with the tetanus vaccine when ongoing protection is also needed. It gives passive protection, meaning it supplies antibodies directly rather than teaching the body to make its own, and it is generally well tolerated.
Education and reference only. This is a plain-language guide to Tetanus immunoglobulin — it deliberately contains no doses. Doses depend on the person, the brand and the reason for treatment, and belong with your prescriber. Always check the BNF, the product labelling (SmPC) and follow medical advice.
What it is
Tetanus immunoglobulin is a preparation of antibodies, taken from human blood plasma, that act against the toxin made by the tetanus bacteria. It is used to give immediate, ready-made protection after a tetanus-prone wound, such as a deep or dirty wound, especially in people who are not fully vaccinated against tetanus. Because it supplies antibodies directly, it works straight away, unlike the vaccine which takes time to build up protection. It is given by injection, usually into a muscle, and is often used alongside the tetanus vaccine when both immediate and longer-term protection are needed.
How it works
Tetanus immunoglobulin provides protection by supplying ready-made antibodies that neutralise the tetanus toxin before it can cause harm. This is called passive immunisation, because the antibodies are given directly rather than being made by the person's own immune system. The effect is immediate but temporary, lasting only weeks, because these borrowed antibodies are gradually broken down. For this reason it is given for short-term cover after a risky wound, and the tetanus vaccine is usually given as well so the body can build its own lasting protection over time.
Company & origin
Originated / developed by: Specialist manufacturers.
A blood product used in the UK to give immediate protection against tetanus after a wound that carries a risk of the infection.
Practical use
How to take Tetanus immunoglobulin
General, dose-free guidance — always follow your prescriber's and the leaflet's specific instructions.
- It is given by a healthcare professional as an injection, usually into a muscle, soon after a tetanus-prone wound.
- It is often given at the same time as the tetanus vaccine when you also need longer-term protection, using a different site.
- Make sure the wound itself is properly cleaned and cared for, as this is an important part of preventing tetanus.
- Tell the clinician about your tetanus vaccination history, as this helps them decide whether you need it.
- Mention any previous reactions to blood products or injections before it is given.
Weighing it up
Advantages & disadvantages of Tetanus immunoglobulin
Advantages
- Gives immediate protection against tetanus after a risky wound, working straight away.
- Useful when someone is not fully vaccinated or the wound is high-risk.
- Generally well tolerated and can be given alongside the tetanus vaccine for both immediate and lasting cover.
Disadvantages
- Protection is short-lived, so it does not replace being vaccinated against tetanus.
- It is a blood product given by injection, which some people prefer to avoid.
- It only covers the immediate situation, so the vaccine is usually still needed for lasting protection.
Practical use
Good to know
The key thing to understand is that tetanus immunoglobulin gives immediate but short-lived protection and is not a vaccine: it supplies ready-made antibodies rather than teaching your body to make its own. Because of this, it is often given together with the tetanus vaccine when a wound is tetanus-prone and your vaccination is not up to date, so you get both immediate cover and lasting protection. It is a blood product made from human plasma, which is carefully screened and treated to make it as safe as possible. It is generally well tolerated, with the most common effects being soreness or redness where the injection is given. Whether you need it depends on the type of wound and your vaccination history, which the clinician will assess.
Who should not take it / use with caution
- People who have had a serious allergic reaction to a previous dose or to its ingredients should tell the clinician.
- It is used with care in people who have had reactions to blood products in the past.
- The benefits and risks are weighed carefully, but it is given when needed even in pregnancy because tetanus is dangerous.
Monitoring
- Watching for any allergic-type reaction during and shortly after the injection.
- Checking that the wound is healing and properly cared for.
- Making sure your tetanus vaccination is brought up to date if needed.
Side effects
- Soreness, redness or swelling where the injection is given, which usually settles.
- A mild raised temperature or feeling generally off-colour in some people.
- Rarely, allergic-type reactions, which is why it is given where help is available.
Key interactions
- It can reduce how well some live vaccines work, so the timing of certain vaccines may need to be spaced out.
- Tell the clinician about all vaccines you have had recently or are due to have.
- There are few other routine medicine interactions, but always share your full medicines list.
Available as: A solution for injection, usually given into a muscle by a healthcare professional.
Answers
Tetanus immunoglobulin: frequently asked questions
What is tetanus immunoglobulin used for?
It gives immediate, ready-made antibody protection against tetanus after a wound that carries a risk of the infection, particularly when someone is not fully vaccinated.
Is it the same as the tetanus vaccine?
No. It gives immediate but short-lived protection by supplying antibodies directly, while the vaccine teaches your body to make its own lasting protection; the two are often given together.
How is it given?
It is given by a healthcare professional as an injection, usually into a muscle, soon after a tetanus-prone wound.
Is it safe as a blood product?
It is made from human plasma that is carefully screened and treated to make it as safe as possible, and it is generally well tolerated.
Will I still need the vaccine?
Usually yes, because the immunoglobulin only protects for a short time, so the vaccine is given as well to build lasting protection if your jabs are not up to date.
The wider class
About Human immunoglobulin (passive immunisation)
Tetanus immunoglobulin belongs to the human immunoglobulin (passive immunisation) class. For how the class as a whole works, its shared safety principles and monitoring, see the full guide.
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Authoritative sources
- BNF
- NICE CKS
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