Red Back Spider Antivenom Solution for injection

Red Back Spider Antivenom Solution for injection is a brand of medicine containing the active ingredient red back spider antivenom.

Find out more about active ingredients.

Consumer medicine information (CMI) leaflet

Developed by the pharmaceutical company responsible for this medicine in Australia, according to TGA regulations.

Red Back Spider Antivenom

Consumer Medicine Information

What is in this leaflet

This leaflet answers some common questions about Red Back Spider Antivenom.

It does not contain all the available information. It does not take the place of talking to your doctor or pharmacist.

All medicines have risks and benefits. Your doctor has weighed the risks of you having Red Back Spider Antivenom against the benefits they expect it will have.

If you have any concerns about this medicine, ask your doctor, nurse or pharmacist.

Keep this leaflet. You may need to read it again.

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What Red Back Spider Antivenom is used for

What it is used for

Red Back Spider Antivenom is given to those people who become ill after being bitten by a red back spider.

Not everyone who is bitten needs the antivenom as some people have only very mild effects from the bite or none at all. However some people can become very ill after being bitten and in these people it is essential to use an appropriate amount of antivenom to counteract the effects of the poison.

How it works

Red Back Spider Antivenom is an injection designed to help neutralise the effect of the poison (venom) of the red back spider.

It is made by immunising horses against the venom of the red back spider and then collecting that part of the horse’s blood which neutralises this poison.

The antivenom is purified and made into an injection for people who may need it after being bitten by a red back spider.

Ask your doctor if you have any questions about why this medicine has been given to you.

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Before you are given Red Back Spider Antivenom

When you must not be given it

As there are sometimes unpleasant and dangerous reactions to the antivenom (see Side Effects), it should not be given to people who have no effects from the bite.

However as Red Back Spider Antivenom can be an emergency life-saving product, it should not be withheld from anyone who needs it.

Before you are given it

Tell your doctor if:

  1. you have allergies to:
  • any other medicines
  • any other substances such as foods, preservatives or dyes.
  1. you have, or have had any medical conditions, especially the following:
  • asthma
  • hayfever.
  1. you have ever had injections made from horse serum (snake bite and other antivenoms).
  2. you had an anti-tetanus injection before 1974.
  3. you are pregnant or you are breast feeding.
    Your doctor can discuss with you the risks and benefits involved.

If you have not told your doctor about any of the above, tell him/her before you are given Red Back Spider Antivenom.

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How Red Back Spider Antivenom is given

How much is given

The dose for both adults and children is one vial (500 units). This dose can be repeated as necessary.

Your doctor will take precautions to counteract any allergic reactions if they should happen.

How it is given

This medicine is usually injected into a muscle, or in life-threatening cases may be diluted and given via a vein.

Red Back Spider Antivenom does not contain any antimicrobial preservative. It should be used once and any residue discarded.

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After having Red Back Spider Antivenom

When medicines are produced in animals and injected into you, it is always possible that viruses or other substances could be present in the medicine and cause an illness. These could be viruses or other infectious agents which may not yet have been discovered. In the past, there have been no reports of this ever having happened with this product.

If you have any queries about any aspect of this medicine, or questions regarding information in this leaflet, discuss them with your doctor or pharmacist.

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Side effects

Tell your doctor or pharmacist as soon as possible if you do not feel well after having Red Back Spider Antivenom.It may have unwanted side effects in some people. All medicines can have side effects. Sometimes they are serious, most of the time they are not. You may need medical treatment if you get some of the side effects.

As the injection is made from horse serum, side effects occur more commonly in those who have allergies, particularly if they have ever had injections before which were also prepared from horses. Allergic reactions can be treated by your doctor.

Ask your doctor or pharmacist to answer any questions you have.

Tell your doctor or pharmacist if you notice any of the following and they worry you:

  • local reaction around the injection site such as redness, itchiness, tenderness, pain or discomfort, warmth, burning or stinging, swelling or the formation of hard lumps or scars (local injection site reactions).

These side effects are usually mild.

Tell your doctor immediately if you notice any of the following:

  • sudden signs of allergy such as rash, itching or hives on the skin, swelling of the face, lips, tongue or other parts of the body, shortness of breath, wheezing or trouble breathing
  • rapid, shallow breathing, cold, clammy skin, a rapid, weak pulse, dizziness, weakness and fainting
  • pinkish, itchy swellings on the skin, also called hives or nettle rash
  • fever, swelling, skin rash, joint pains anytime up to two weeks after the injection
  • swollen glands in the neck, armpit and groin
  • chest pain
  • high temperature.

These may be serious side effects. You may need urgent medical attention.

Tell your doctor or pharmacist if you notice anything that is making you feel unwell. Other side effects not listed above may also occur in some people.

Do not be alarmed by this list of possible side effects. You may not experience any of them.

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Storing Red Back Spider Antivenom

Red Back Spider Antivenom is usually stored in a doctor’s surgery, hospital or ambulance. However, if you need to store it:

  • Keep it where children cannot reach it.
  • Keep it in the original pack until it is needed.
  • Keep it in the refrigerator, between 2°C and 8°C and protect it from light. Do not freeze Red Back Spider Antivenom.

Do not use Red Back Spider Antivenom after the expiry date printed on the pack.

Do not use Red Back Spider Antivenom if the packaging is torn or shows signs of tampering.

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Product description

What it looks like

Red Back Spider Antivenom is supplied in a vial.


Active ingredient:

  • 500 units of Red Back Spider Antivenom.

Other ingredients:

  • sodium chloride
  • phenol
  • substances in horse blood.

Name and Address of Sponsor

Red Back Spider Antivenom is sponsored by:
CSL Limited,
ABN 99 051 588 348
45 Poplar Road
Parkville 3052

The Australian Registration Number is AUST R 74893.

This leaflet was prepared in October 2013.

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CMI provided by MIMS Australia, December 2014  

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