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Varilrix

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How does it work?

This chickenpox vaccine contains a live, weakened form of the virus that causes chickenpox, varicella-zoster. It provokes the body's immune response without causing the disease. When the body is exposed to foreign organisms, the immune system produces antibodies. These antibodies are specific to the infecting agent and their first function is to help the body recognise and kill the foreign organisms. The antibodies formed remain in the body and recognise and attack any future infection with the same organism. This is known as active immunity. Protection against many infections can be provided artificially by means of vaccines derived from altered forms of infecting organisms. These vaccines stimulate the immune system to produce antibodies in the same way as genuine infection, without actually causing the disease. Each organism stimulates the production of a specific type of antibody, therefore different vaccines are required for each disease. This vaccine provides immunity against chickenpox infection. It is given as two doses, separated by approximately eight weeks (minimum six weeks). Chickenpox in adults can be much more serious than chickenpox in children. The chickenpox vaccine is therefore offered to adults who don't already carry antibodies to the chickenpox virus and so could be at risk of catching the disease; ie those who have not already had chickenpox. The vaccine is not given routinely to children, but may be given to those who have not had chickenpox and who are in close contact people at high risk of severe chickenpox infections. These include people with weak immune systems, eg due to diseases such as HIV infection or leukaemia, and those taking medicines that suppress the immune system, such as chemotherapy or long-term oral corticosteroids.

What is it used for?

- Vaccination against chickenpox

Warning!

- On rare occasions people who have received this vaccine can transmit chickenpox infection to others. If you develop a skin rash within 4-6 six weeks of receiving a dose of this vaccine it is important that you avoid contact with people at high risk of severe chickenpox until the rash has cleared. These include: pregnant women who have not had chickenpox, those with a suppressed immune system, eg due to HIV, leukaemia, or other blood disorders, and people receiving medicines that suppress the immune system, such as chemotherapy, corticosteroids, or following an organ transplant.
- The safety of this vaccine during pregnancy has not been established and it must not be administered to pregnant women because of the unknown risk to the mother and foetus. Women who receive this vaccine should use contraceptive measures to prevent pregnancy occuring between the two vaccine doses, and for three months following the second dose.
- This vaccine may not completely protect all individuals who receive it, and does not provide full immunity against chickenpox infection until about six weeks after the second dose.

Use with caution in

- Severe skin disorders, such as severe eczema

Not to be used in

- Allergy to other varicella vaccines
- Allergy to the antibiotic neomycin
- Breastfeeding
- Children less than 1 year of age
- People who are or who have recently received treatment that suppresses the activity of the immune system, eg long-term oral corticosteroids, chemotherapy, radiotherapy, medicines to prevent transplant rejection
- People whose immune systems have a decreased ability to fight infection and disease, eg due to diseases such as leukaemia, lymphoma, HIV infection or immunodeficiency syndromes
- Pregnancy
- Sudden severe feverish illness

This medicine should not be used if you are allergic to one or any of its ingredients. Please inform your doctor or pharmacist if you have previously experienced such an allergy. If you feel you have experienced an allergic reaction, stop using this medicine and inform your doctor or pharmacist immediately.

Pregnancy and Breastfeeding

Certain medicines should not be used during pregnancy or breastfeeding. However, other medicines may be safely used in pregnancy or breastfeeding providing the benefits to the mother outweigh the risks to the unborn baby. Always inform your doctor if you are pregnant or planning a pregnancy, before using any medicine.

- The safety of this vaccine during pregnancy has not been established and it must not be administered to pregnant women because of the unknown risk to the mother and foetus. Women who receive this vaccine should use contraceptive measures to prevent pregnancy occuring between the two vaccine doses, and for three months following the second dose.
- The infants of women who have not had chickenpox will not have acquired immunity to chickenpox from their mothers. Breastfeeding mothers should therefore not be given this vaccine, as there may be a risk of the vaccine strain of the virus being transmitted to the infant through the breast milk, causing infection.

Side effects

Medicines and their possible side effects can affect individual people in different ways. The following are some of the side effects that are known to be associated with this medicine. Because a side effect is stated here, it does not mean that all people using this medicine will experience that or any side effect.

- Headache
- Rash
- Fatigue
- Fever (pyrexia)
- Dizziness
- Inflammation of the throat (pharyngitis)
- Itching (pruritis)
- Inflammation of the lining of the nose (rhinitis) causing a blocked or runny nose
- Cough
- Chest pain
- A general feeling of being unwell (malaise)
- Pain in the muscles and joints
- Pain, swelling, redness and hardening of the skin at the injection site

The side effects listed above may not include all of the side effects reported by the drug's manufacturer. For more information about any other possible risks associated with this medicine, please read the information provided with the medicine or consult your doctor or pharmacist.



The documents contained in this web site are presented for information purposes only. The material is in no way intended to replace professional medical care or attention by a qualified practitioner. The materials in this web site cannot and should not be used as a basis for diagnosis or choice of treatment. Conditions for use Powered by netdoctor
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