Consumer medicine information

Adacel

Diphtheria toxoid; Tetanus toxoid; Pertussis vaccine

BRAND INFORMATION

Brand name

Adacel

Active ingredient

Diphtheria toxoid; Tetanus toxoid; Pertussis vaccine

Schedule

S4

 

Consumer medicine information (CMI) leaflet

Please read this leaflet carefully before you start using Adacel.

SUMMARY CMI

ADACEL®

Consumer Medicine Information (CMI) summary

The full CMI on the next page has more details. If you are worried about using this medicine, speak to your doctor or pharmacist.

1. Why am I using Adacel?

Adacel is a vaccine. It is used to help prevent whooping cough (pertussis), tetanus and diphtheria in persons aged 10 years and over as a booster following primary immunisation. Use of Adacel during pregnancy allows antibodies to be passed to the baby in the womb from the pregnant woman to protect the baby from whooping cough during the first few months of life.

For more information, see Section 1. Why am I using Adacel? in the full CMI.

2. What should I know before I use Adacel?

Do not use if you have ever had an allergic reaction to Adacel or any of the ingredients listed at the end of the CMI.

Talk to your doctor if you have any other medical conditions, take any other medicines, or are pregnant or plan to become pregnant or are breastfeeding.

For more information, see Section 2. What should I know before I use Adacel? in the full CMI.

3. What if I am taking other medicines?

Some medicines may interfere with Adacel and affect how it works.

A list of these medicines is in Section 3. What if I am taking other medicines? in the full CMI.

4. How do I use Adacel?

Adacel is given as an injection, usually into your upper arm muscle by a doctor or nurse.

More instructions can be found in Section 4. How do I use Adacel? in the full CMI.

5. What should I know while using Adacel?

Things you should do

Tell your doctor or nurse before you receive this vaccine if you:

  • are allergic to the active substances or any of the other ingredients in this vaccine
  • are currently suffering from an illness
  • had serious encephalopathy (disease of brain) without an apparent cause within 7 days of a previous pertussis, tetanus or diphtheria vaccination
Things you should not do
  • Do not have Adacel if you have a history of severe allergic reactions to any of the ingredients listed, previous dose of this vaccine or another vaccine designed to protect against pertussis, tetanus and diphtheria.
Looking after your medicine
  • Adacel is usually stored in the doctor's surgery or clinic. However, if you need to store Adacel keep it in the refrigerator, between 2°C and 8°C. Do not freeze Adacel. Freezing destroys the vaccine.

For more information, see Section 5. What should I know while using Adacel? in the full CMI.

6. Are there any side effects?

The most common side effects of Adacel are local reaction around the injection site, headaches, tiredness, fever, chills, soreness, joint pain, nausea and vomiting, diarrhoea, loss of appetite.

For more information, including what to do if you have any side effects, see Section 6. Are there any side effects? in the full CMI.



FULL CMI

ADACEL®

Active ingredients: Diphtheria toxoid, Tetanus Toxoid, Pertactin, Pertussis filamentous haemagglutinin, Pertussis fimbriae 2 + 3, and Pertussis toxoid


Consumer Medicine Information (CMI)

This leaflet provides important information about using Adacel. You should also speak to your doctor or pharmacist if you would like further information or if you have any concerns or questions about using Adacel.

Where to find information in this leaflet:

1. Why am I using Adacel?
2. What should I know before I use Adacel?
3. What if I am taking other medicines?
4. How do I use Adacel?
5. What should I know while using Adacel?
6. Are there any side effects?
7. Product details

1. Why am I using Adacel?

Adacel contains the active ingredient Diphtheria toxoid, Tetanus toxoid, Pertactin, Pertussis filamentous haemagglutinin, Pertussis fimbriae 2 + 3, and Pertussis toxoid.

Adacel is a vaccine used to help prevent whooping cough (pertussis), tetanus and diphtheria.

This vaccine is for use as a booster in persons from the age of 10 years who have previously received childhood immunisation. Use of Adacel during pregnancy allows antibodies to be passed to the baby in the womb from the pregnant woman to protect the baby from whooping cough during the first few months of life.

Adacel is not intended for childhood immunisation.

The use of Adacel should be determined on the basis of official recommendations and by your doctor.

Whooping cough, tetanus and diphtheria cause significant sickness and sometimes death in unvaccinated infants, children, and adults.

Adacel works by causing the body to produce its own protection against whooping cough, tetanus, and diphtheria. It does this by making substances called antibodies in the blood, which fight the bacteria and toxins that cause these diseases. If a vaccinated person comes into contact with these bacteria and toxins, the body is usually ready to destroy them.

It usually takes several weeks after vaccination to develop protection against these diseases. Most people will produce enough antibodies against these diseases. However, as with all vaccines, 100% protection cannot be guaranteed. The vaccine will not give you any of these diseases.

The chance of a severe reaction from Adacel is very small, but the risks from not being vaccinated against these diseases may be very serious.

2. What should I know before I use Adacel?

Warnings

Do not use Adacel if:

  • you are allergic to the active ingredients, or any of the ingredients listed at the end of this leaflet.
    Always check the ingredients to make sure you can use this medicine.
  • a history of severe allergic reaction to a previous dose of this vaccine or another vaccine designed to protect against pertussis, tetanus and diphtheria. Symptoms of an allergic reaction may include:
    - shortness of breath, wheezing or difficulty breathing
    - swelling of the face, lips, tongue or other parts of the body
    - skin rash, itching or hives
  • had serious encephalopathy (disease of brain) without an apparent cause within 7 days of a previous pertussis, tetanus or diphtheria vaccination
  • moderate or high temperature and/or acute illness

Adacel is not recommended for use in children under 10 years. If you are not sure whether you should have Adacel, talk to your doctor or pharmacist.

Check with your doctor if you:

  • have a moderate or high temperature and/or acute illness. Your doctor may decide to delay vaccination until the illness has passed. A mild illness, such as a cold, is not usually a reason to delay vaccination.
  • you have, or have had, any medical conditions, especially the following:
    - lowered immunity due to diseases such as some blood disorders, kidney disease requiring dialysis, HIV/AIDS or cancer
    - lowered immunity due to treatment with medicines
    - Guillain-Barre syndrome (temporary inflammation of nerves causing pain, paralysis and sensitivity disorders) after being given a vaccine containing tetanus toxoid (an inactivated form of tetanus toxin). In this case, the decision to give any further vaccine containing tetanus toxoid should be evaluated by your doctor.
    - undiagnosed illness of the brain or epilepsy which is not controlled. Your doctor will assess the potential benefit offered by vaccination
    - bleeding disorder
  • have an allergy to latex

After vaccination, you may be at risk of developing certain side effects. It is important you understand these risks and how to monitor for them. See additional information under Section 6. Are there any side effects?

Pregnancy and breastfeeding

Check with your doctor if you are pregnant or intend to become pregnant.

Your doctor will discuss the possible risk and benefits of having Adacel during pregnancy.

Adacel may be administered during pregnancy for prevention of pertussis in young infants.

Talk to your doctor if you are breastfeeding or intend to breastfeed.

Your doctor will discuss the possible risks and benefits of having Adacel during breastfeeding.

3. What if I am taking other medicines?

Tell your doctor or pharmacist if you are taking any other medicines, including any medicines, vitamins or supplements that you buy without a prescription from your pharmacy, supermarket or health food shop.

Some medicines may interfere with Adacel and affect how it works.

Check with your doctor or pharmacist if you are not sure about what medicines, vitamins or supplements you are taking and if these affect Adacel.

Having other vaccines

Your doctor will advise you if Adacel is to be given with another vaccine.

4. How do I use Adacel?

How much to use

  • The dose of Adacel is a single dose of 0.5mL
  • Adacel is given as an injection, usually into your upper arm muscle by a doctor or nurse.
  • Adacel should not be injected directly into the veins.

When to use Adacel

  • Adacel is generally given whenever a booster dose of whooping cough, tetanus and diphtheria vaccine is required.

If you use too much Adacel

Overdose is most unlikely because your doctor or nurse gives the injections. If you have any concerns, ask your doctor.

5. What should I know while using Adacel?

Things you should do

Call your doctor straight away if you:

  • do not feel well after having Adacel

Remind any doctor, dentist or pharmacist you visit that you are using Adacel.

Looking after your medicine

  • Adacel is usually stored in the doctor's surgery or clinic, or at the pharmacy.
  • However, if you need to store Adacel:
    - Keep Adacel in the original pack until it is time for it to be given.
    - Keep it in the refrigerator, between 2°C and 8°C. If Adacel happens to be stored out of the refrigerator at room temperature, it can be used for up to 72 hours after it was last refrigerated. If Adacel is stored out of the refrigerator for longer than 72 hours, it should be discarded.
    - Do not freeze Adacel. Freezing destroys the vaccine.
    - Do not use Adacel after the expiry date printed on the pack.
    - Do not use Adacel if the packaging is torn or shows signs of tampering

Keep it where young children cannot reach it.

Getting rid of any unwanted medicine

If you no longer need to use this medicine or it is out of date, take it to any pharmacy for safe disposal.

Do not use this medicine after the expiry date.

6. Are there any side effects?

All vaccines can have side effects. If you do experience any side effects, most of them are minor and temporary. However, some side effects may need medical attention.

See the information below and, if you need to, ask your doctor or pharmacist if you have any further questions about side effects.

Less serious side effects

Less serious side effectsWhat to do
  • local reaction around the injection site such as redness, pain or discomfort, swelling or the formation of hard lumps
  • headaches
  • tiredness, weakness or fatigue
  • fever
  • chills
  • soreness, aching muscles, muscle tenderness or weakness (not caused by exercise)
  • joint pain or joint swelling nausea and vomiting
  • diarrhoea
  • loss of appetite
  • large injection site reactions and extensive limb swelling
  • injection site bruising, abscess
  • A small lump in the area where the vaccine was injected.
Speak to your doctor if you have any of these less serious side effects and they worry you

Serious side effects

Serious side effectsWhat to do
  • sudden severe allergic reactions (anaphylactic reaction), for which symptoms may include rash, low blood pressure (hypotension), swelling of the face, lips, tongue or other parts of the body (angioedema, oedema), shortness of breath, wheezing or trouble breathing
  • neurological disorders that may results in confusion, numbness or tingling, pain and weakness of the limbs, loss of balance, loss of reflexes, paralysis of parts or all the body (Guillain-Barre syndrome, brachial neuritis, myelitis)
  • decreased feeling or sensitivity, especially in the skin (hypoesthesia)
  • fainting
  • convulsion
  • drooping eyelid and sagging muscles on one side of the face (facial palsy)
  • tingling or numbness of the hands or feet (paraesthesia)
  • itching or hives on the skin (urticaria, pruritus)
  • weakness, and pain in muscles (myositis)
  • inflammation of heart muscle, for which symptoms may include shortness of breath, chest pain and irregular heartbeat (myocarditis)
Call your doctor straight away, or go straight to the Emergency Department at your nearest hospital if you notice any of these serious side effects.

Tell your doctor or pharmacist if you notice anything else that may be making you feel unwell.

Other side effects not listed here may occur in some people.

Reporting side effects

After you have received medical advice for any side effects you experience, you can report side effects to the Therapeutic Goods Administration online at www.tga.gov.au/reporting-problems (Australia) or in New Zealand at https://nzphvc.otago.ac.nz/reporting.

By reporting side effects, you can help provide more information on the safety of this medicine.

Always make sure you speak to your doctor or pharmacist before you decide to stop taking any of your medicines.

7. Product details

This medicine is only available with a doctor's prescription.

What Adacel contains

Active ingredient
(main ingredient)
  • not less than 2 IU (2 Lf) diphtheria toxoid
  • not less than 20 IU (5 Lf) tetanus toxoid
  • 2.5 micrograms pertussis toxoid
  • 5 micrograms pertussis filamentous haemagglutinin
  • 3 micrograms pertactin
  • 5 micrograms pertussis fimbriae 2+3
Other ingredients
(inactive ingredients)
  • aluminium phosphate
  • phenoxyethanol
  • formaldehyde
  • glutaral
  • water for injections

Do not take this medicine if you are allergic to any of these ingredients.

The manufacture of this product includes exposure to bovine materials. No evidence exists that any case of vCJD (considered to be the human form of bovine spongiform encephalopathy) has resulted from the administration of any vaccine product.

What Adacel looks like

Adacel is a sterile, uniform, cloudy, white suspension for injection.

AUST R number

297685 (syringe)

Who distributes Adacel

Australia:

sanofi-aventis australia pty ltd
12 - 24 Talavera Road
Macquarie Park NSW 2113
Australia
Tel: 1800 818 806

New Zealand:

Pharmacy Retailing (NZ) Ltd t/a Healthcare Logistics
PO Box 62027
Sylvia Park Auckland 1644
Freecall: 0800 283 684
Email: [email protected]

This leaflet was prepared in September 2023

ada-ccdsv22-cmiv27-25sep23

Published by MIMS November 2023

BRAND INFORMATION

Brand name

Adacel

Active ingredient

Diphtheria toxoid; Tetanus toxoid; Pertussis vaccine

Schedule

S4

 

1 Name of Medicine

Adacel.
Pertussis vaccine-acellular combined with diphtheria and tetanus toxoids (adsorbed).

2 Qualitative and Quantitative Composition

Each 0.5 mL dose of Adacel contains:
Diphtheria toxoid ≥ 2 IU (2 Lf);
Tetanus toxoid ≥ 20 IU (5 Lf)*;
Pertussis toxoid 2.5 micrograms;
Pertussis filamentous haemagglutinin 5 micrograms;
Pertactin 3 micrograms;
Pertussis fimbriae 2 + 3 5 micrograms;
Adsorbed on aluminium phosphate 1.5 mg (0.33 mg aluminium).
*The formulated content of 5 Lf of tetanus toxoid per 0.5 mL dose is the same as the related product Tripacel.
This vaccine may contain traces of formaldehyde and glutaral which are used during the manufacturing process.
For the full list of excipients, see Section 6.1 List of Excipients.
The vaccine is prepared from: purified, formaldehyde-detoxified and adsorbed diphtheria and tetanus toxins; purified, glutaral-detoxified and adsorbed pertussis toxin (pertussis toxoid or PT); purified, formaldehyde-treated and adsorbed filamentous haemagglutinin (FHA); purified and adsorbed pertactin (PRN) and co-purified and adsorbed fimbriae types 2 and 3 (FIM).
Adacel is an adult/adolescent formulation diphtheria-tetanus-acellular pertussis (dTpa) combination vaccine with reduced content of pertussis toxoid, filamentous haemagglutinin and diphtheria toxoid compared to paediatric diphtheria-tetanus-acellular pertussis (DTPa) formulations.
The manufacture of this product includes exposure to bovine materials. No evidence exists that any case of vCJD (considered to be the human form of bovine spongiform encephalopathy) has resulted from the administration of any vaccine product.

3 Pharmaceutical Form

Sterile suspension for injection. Adacel appears as a sterile, uniform, cloudy, white suspension.

4 Clinical Particulars

4.1 Therapeutic Indications

Adacel is indicated for active immunisation against tetanus, diphtheria and pertussis in persons aged 10 years and over as a booster following primary immunisation.
Adacel may be administered during pregnancy for prevention of pertussis in young infants via transplacental antibody transfer from the pregnant woman to the fetus.

4.2 Dose and Method of Administration

Adacel (0.5 mL) should be administered by intramuscular route.
Booster doses of Adacel should be given according to the official national recommendations as per the current Immunisation Handbook.
Consistent with the official national recommendations, in adolescents or adults with an unknown or incomplete vaccination against diphtheria, tetanus and pertussis, one dose of dTpa vaccine should be administered as part of a vaccination series against diphtheria, tetanus, and pertussis. Two additional doses of a diphtheria and tetanus containing vaccine should also be given.
Adacel can be used for repeat vaccination, after a previous dose of dTpa or dTpa-IPV to boost immunity to diphtheria, tetanus and pertussis at 5- to 10-year intervals. Repeat vaccination should be performed taking into account official national recommendations.
If Adacel is administered to a pregnant woman, it should be done according to official national recommendations for pertussis vaccination of a pregnant woman.
For further information, refer to the current Immunisation Handbook.

Administration.

Inject 0.5 mL intramuscularly. The preferred site is into the deltoid muscle. The vaccine should not be injected into the gluteal area.
The vaccine's normal appearance is a uniform, cloudy, white suspension which may sediment during storage. Shake the prefilled syringe well to uniformly distribute the suspension before withdrawing the dose.
Parenteral biological products should be inspected visually for extraneous particulate matter and/or discolouration prior to administration. If these conditions exist, the product should not be administered.
Separate syringes, separate injection sites and preferably separate limbs must be used in case of concomitant administration.
Product is for single use in one patient on one occasion only. Discard any residue.

4.3 Contraindications

Hypersensitivity.

Adacel should not be administered to individuals with a history of severe allergic reaction after previous administration of the vaccine or a vaccine containing the same components or constituents.
Adacel should not be administered to individuals with a history of severe allergic reaction to any component of the vaccine listed (see Section 2 Qualitative and Quantitative Composition; Section 6.1 List of Excipients).

Febrile or acute disease.

Generally, vaccination must be postponed in cases of moderate or severe febrile and/or acute disease. Low-grade fever does not constitute a contraindication.

Neurological disorders.

Adacel should not be administered to individuals who experienced an encephalopathy of unknown origin within 7 days of previous immunisation with a pertussis-containing vaccine, or to individuals who have experienced other neurological complications following previous immunisation with any of the antigens in Adacel.

4.4 Special Warnings and Precautions for Use

Hypersensitivity.

Formaldehyde and glutaral have been used in the manufacturing process of this product and trace residual amounts may be present in the final product. Therefore, a hypersensitivity reaction may occur.

Administration route related precautions.

Do not administer by intravascular injection: ensure that the needle does not penetrate a blood vessel.
As with all injectable vaccines, the vaccine must be administered with caution to individuals with thrombocytopenia or a bleeding disorder since bleeding may occur following an intramuscular administration to these individuals.

Serious and severe adverse events related precautions.

As with all injectable vaccines, appropriate medical treatment and supervision should be readily available for immediate use in case of a rare anaphylactic reaction following the administration of vaccine. As a precautionary measure, adrenaline (epinephrine) injection (1:1,000) must be immediately available in case of unexpected anaphylactic or serious allergic reactions.

Syncope.

Syncope (fainting) can occur following, or even before, administration of injectable vaccines, including Adacel. Procedures should be in place to prevent falling injury and manage syncopal reactions.

Latex.

The tip caps of the prefilled syringes contain a natural rubber latex derivative, which may cause allergic reactions in latex sensitive individuals.

Neurological disorders.

If Guillain-Barré syndrome occurred within 6 weeks of receipt of prior vaccine containing tetanus toxoid, the decision to give any vaccine containing tetanus toxoid, including Adacel, should be based on careful consideration of the potential benefits and possible risks.
Adacel should not be administered to individuals with progressive or unstable neurological disorders, uncontrolled epilepsy or progressive encephalopathy until a treatment regimen has been established, the condition has stabilised and the benefit clearly outweighs the risk.

Altered immune status.

Immunocompromised individuals (whether from disease or treatment) may not obtain the expected immune response. If possible, consideration should be given to delaying vaccination until after the completion of any immunosuppressive treatment. Nevertheless, vaccination of individuals with chronic immunodeficiency such as HIV infection is recommended even if the immune response might be limited.

Protection.

As with any vaccine, immunisation with Adacel may not protect 100% of susceptible individuals.
The use of Adacel as a primary series, or to complete the primary series, has not been studied. A booster response will only be elicited in individuals who have been previously primed by vaccination or infection.

Use in the elderly.

Adacel is indicated for use in the elderly.

Paediatric use.

Adacel is indicated for use in children aged 10 years and over.
Adacel should not be used for primary immunisation.

Effects on laboratory tests.

Interference of Adacel with laboratory and/or diagnostic tests has not been studied.

4.5 Interactions with Other Medicines and Other Forms of Interactions

Adacel can be administered concomitantly with hepatitis B vaccine, using a separate limb for the site of injection.
In a clinical trial conducted in adolescents 11 to 17 years of age, when Adacel was administered concomitantly with Menactra, antibody responses to pertussis (with the exception of PRN and FIM), tetanus and diphtheria antigens were non-inferior to those observed when each vaccine was administered separately. Geometric mean concentrations (GMCs) of antibodies to the pertussis antigens PRN and FIM were lower when Adacel was administered concomitantly with Menactra than when Adacel was administered alone. Given the strong response to all pertussis antigens across the treatment groups, and since there are no widely accepted serological correlates of protection for pertussis, the clinical significance of these lower pertussis antibody responses is unknown. The immunogenicity profile of Menactra was similar when administered concomitantly with Adacel or separately.
Separate injection sites and separate syringes must be used in case of concomitant administration.
Immunosuppressive treatment may interfere with the development of the expected immune response to Adacel, see Section 4.4 Special Warnings and Precautions for Use.

4.6 Fertility, Pregnancy and Lactation

Effects on fertility.

Adacel has not been evaluated for the possible effects on fertility.
(Category A)
(Category A - definition: drugs which have been taken by a large number of pregnant women and women of childbearing age without any proven increase in the frequency of malformations or other direct or indirect harmful effects on the fetus having been observed.)

Human data.

Multiple studies involving numerous pregnant women and their offspring have generated considerable safety, immunogenicity and effectiveness data on the use of Adacel and Adacel Polio, which contains the same tetanus, diphtheria and acellular pertussis components as Adacel, primarily during the second and third trimesters of pregnancy.
Safety data are available from 4 randomised controlled trials (310 pregnancy outcomes), 6 observational studies (84,371 pregnancy outcomes) and from passive surveillance:
Adacel and Adacel Polio led to no more than the expected (generally mild or moderate, and usually self-limited) adverse events for pregnant women who receive it. Safety outcomes for pregnant women were very similar to those seen when these vaccines were given to non-pregnant women of childbearing age;
Adacel and Adacel Polio have not been shown to cause harm to the fetus or newborn;
Although some observational studies report a slight increase in chorioamnionitis when dTpa vaccine has been given to pregnant women, this has not been associated with adverse outcomes for the pregnant women or their newborns.
Immunogenicity data from 13 studies and effective data from 3 studies have shown:
Pertussis antibody responses following vaccination with Adacel are robust in most pregnant women, are amplified when measured in newborn cord blood, persist for 2 to 4 months in the infant, but appear to blunt (reduce) the infant's antibody responses to her or his own pertussis vaccinations later in infancy. There is no evidence to suggest that this blunting is clinically relevant in protection against pertussis;
Adacel and Adacel Polio are > 90% effective when given to women during pregnancy in preventing pertussis disease and hospitalisation in their infants younger than 3 months of age as details in Table 1.
The decision to administer Adacel to a pregnant woman should be made according to the official national recommendations for pertussis vaccination of a pregnant woman.
It is not known whether the active substances included in Adacel are excreted in human milk, but antibodies to the vaccine antigens have been found to be transferred to the suckling offspring of rabbits.
The effect on breast-fed infants of the administration of Adacel to their mothers has not been studied. As Adacel is inactivated, any risk to the mother or the infant is improbable. The risks and benefits of vaccination should be assessed before making the decision to immunise a nursing woman.

4.7 Effects on Ability to Drive and Use Machines

No studies on the effects on the ability to drive and use machines have been performed.

4.8 Adverse Effects (Undesirable Effects)

The reactions are listed within body systems and categorised by frequency according to the following definitions: very common (≥ 1/10), common (< 1/10 and ≥ 1/100), uncommon (< 1/100 and ≥ 1/1,000).

Clinical trial experience.

In clinical studies with 324 adolescents and 638 adults given Adacel, the most frequently reported adverse reactions occurring during the first 24 hours included the following:
Very common: pain, swelling, redness at the injection site, headache, decreased energy, generalised body ache.
Common: fever, chills, nausea, diarrhoea, sore or swollen joints.
Uncommon: vomiting.
A causal relationship to vaccination was not established in all cases. All adverse reactions were generally mild and transient in duration. Fever was reported in less than 3% of vaccinees. There were no reports of fever over 39.9°C. This adverse reaction profile was shown to be comparable to that seen in vaccinees who received a booster with Td adsorbed vaccine (tetanus (5 Lf) and diphtheria (2 Lf) toxoids adsorbed). Late onset local adverse reactions (i.e. a local adverse reaction which had an onset or increase in severity 3 to 8 days post-immunisation) such as redness, swelling and pain, occurred in less than 2%.
Table 2 summarises adverse events (%) in Adacel (dTpa) recipients 0-24 hours post-vaccination.

Safety following repeat vaccination.

The safety and tolerability of repeat vaccination with Adacel was evaluated in two open-label, non-randomised clinical studies. In study Td518, adolescent and adult subjects received Adacel approximately 5 years after a previous dose of Adacel. In study Td526, adult subjects received Adacel 10 years after a previous dose of Adacel or Adacel Polio.
The frequency of solicited injection-site and systemic reactions reported following repeat administration of Adacel at 5 and 10 years are presented in Table 3.

Post-marketing experience.

The following additional adverse events have been spontaneously reported during the post-marketing use of Adacel worldwide. Because these events are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to vaccine exposure. Decisions to include these events in labelling were based on one or more of the following factors: 1) severity of the event, 2) frequency of reporting, or 3) strength of causal connection to Adacel.

Immune system disorders.

Hypersensitivity (anaphylactic) reaction (angioedema, oedema, rash, hypotension).

Nervous system disorders.

Paraesthesia, hypoesthesia, Guillain-Barré syndrome, brachial neuritis, facial palsy, convulsion, syncope, myelitis.

Cardiac disorders.

Myocarditis.

Skin and subcutaneous tissue disorders.

Pruritus, urticaria.

Musculoskeletal and connective tissue disorders.

Myositis.

General disorders and administration site conditions.

Large injection site reactions (> 50 mm) and extensive limb swelling from the injection site beyond one or both joints occur after administration of Adacel in adolescents and adults. These reactions usually start within 24-72 hours after vaccination, may be associated with erythema, warmth, tenderness or pain at the injection site and resolve spontaneously within 3-5 days.
Injection site bruising, injection site nodule, sterile abscess.

Reporting suspected adverse reactions.

Reporting suspected adverse reactions after registration of the medicinal product is important. It allows continued monitoring of the benefit-risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions at www.tga.gov.au/reporting-problems.

4.9 Overdose

For information on the management of overdose, contact the Poisons Information Centre on 13 11 26 (Australia).

5 Pharmacological Properties

5.1 Pharmacodynamic Properties

Pharmacotherapeutic group: Pertussis, purified antigens, combinations with toxoids.
ATC code: J07AJ52.

Clinical trials.

A total of 962 individuals (324 adolescents and 638 adults), who had not been immunised against tetanus, diphtheria, or pertussis within the previous five years, received a single 0.5 mL dose of Adacel in three clinical trials (TC9704, Td9805 and TC9707).
In TC9704, 449 (55 adolescents 12 to 17 years of age and 394 adults 18 to 54 years of age) received three lots of Adacel (dTpa), while 300 (37 adolescents and 263 adults) were given a single 0.5 mL dose with an adult formulation diphtheria-tetanus vaccine (Td) and a monovalent acellular pertussis (aP) vaccine, given separately, one month apart. In Td9805, 269 adolescents 11 to 12 years of age were vaccinated: 135 received Adacel given alone followed by the first dose of a 3-dose primary series with hepatitis B vaccine (HB), one month later, and 134 were given Adacel concurrently with the first dose of HB.
In TC9704, the safety and immunogenicity profile of Adacel was shown to be comparable to that observed with a single booster dose of Td and aP containing the same amount of tetanus and diphtheria toxoids and pertussis antigens, administered separately. In Td9805, the safety and immunogenicity of concomitant administration of hepatitis B vaccine with Adacel (dTpa+HB) was comparable to that observed with Adacel alone. Antibody responses observed in adolescents and adults from Td9805 and TC9704 are presented in Tables 4 and 5.
In Td9707, 244 adults (19 to 60 years of age) received Adacel, while 126 received Td and aP, given separately, one month apart. The safety and immunogenicity profile of Adacel was also shown to be comparable to that observed with a single booster dose of Td and aP in study Td9707.
The mechanism of protection from B. pertussis disease is not well understood. In a pertussis efficacy trial conducted in Sweden between 1992 and 1995, primary immunisation with Sanofi Pasteur Limited's acellular pertussis infant DTPa formulation conferred a protective efficacy of 85% against typical pertussis disease (WHO definition). Although Adacel contains only one quarter of the amount of pertussis toxoid present in this acellular pertussis infant DTPa formulation, the antibody responses to Adacel were superior to those observed in the pertussis efficacy trial.

Duration of immunity.

Long-term follow-up of serum antibody levels in adolescents and adults who received a single dose of Adacel shows that protective levels for tetanus antitoxin (≥ 0.01 EU/mL) and diphtheria antitoxin (≥ 0.01 IU/mL) persist in 100% and 99.1% of participants, respectively 10 years post vaccination. While protective levels of pertussis antibodies have not yet been clearly defined, at 10 years post-vaccination pertussis antibody levels were observed to decline towards pre-vaccination levels.
In Study TC9704-LT, the long-term antibody profile suggested that protection against diphtheria, tetanus is maintained for at least 10 years following a booster Adacel administration in both adolescents and adults. The pertussis response to Adacel was also robust, and antibodies persisted at detectable levels higher than pre-immunisation levels for 10 years.
In Study Td9805-LT, the long-term antibody profile suggested that seroprotection against diphtheria and tetanus is maintained for at least 10 years following a booster with Adacel administered either alone or concurrently with hepatitis B vaccine in adolescents. The pertussis response to Adacel was robust, and antibodies persisted at levels 2 to 5-fold higher than pre-vaccination. At 10 years post-vaccination, GMCs further declined, in particular for PT and FHA antigens for which antibody levels decreased almost to pre-vaccination levels.

Immunogenicity following repeat vaccination.

In an open-label, non-randomised clinical trial (Td526), 743 adults were divided into two groups for the evaluation of immunogenicity and safety following repeat vaccination with Adacel. Group 1 comprised 324 persons who previously received Adacel or Adacel-Polio vaccine approximately 10 years earlier as part of study TD9707 or Td9805. Group 2 consisted of age-balanced subjects who had not received any tetanus, diphtheria or pertussis-containing vaccine in the past 10 years.
One month after vaccination, seroprotective tetanus antitoxin levels ≥ 0.1 IU/mL were achieved by 100% and 99.7% of Adacel vaccinees in Groups 1 and 2, respectively. Seroprotective diphtheria antitoxin levels ≥ 0.1 IU/mL were attained by 98.5% and 96.1% in Groups 1 and 2, respectively. (See Table 6.)
GMCs and booster response rates for the pertussis antigens PT, FHA, PRN and FIM pre and post repeat vaccination with Adacel in adults are presented in Table 7. Post-vaccination anti-pertussis antibody GMCs were substantially higher compared to baseline. Non-inferiority for Group 1 (dTpa Repeat Dose) compared to Group 2 (dTpa Naïve) was achieved for antibodies to PT, FHA and PRN, but not FIM. Although non-inferiority was not achieved for FIM, the lower limit of the 95% CI of the GMC ratio (0.66) was only marginally lower than non-inferiority criterion (the lower bound of the 2-sided 95% CI > 0.67). Anti-pertussis booster response rates were high (> 84%) in both Group 1 and Group 2.
Repeat vaccination with Adacel at 10 year intervals induces robust immune responses to tetanus, diphtheria and pertussis in adolescents and adults.

5.2 Pharmacokinetic Properties

Evaluation of pharmacokinetic properties is not required for vaccines.

5.3 Preclinical Safety Data

Genotoxicity.

Adacel has not been tested for genotoxic potential.

Carcinogenicity.

Adacel has not been tested for carcinogenic potential.

6 Pharmaceutical Particulars

6.1 List of Excipients

Aluminium phosphate, phenoxyethanol, water for injections, other ingredients per dose include ≤ 5 micrograms residual formaldehyde and < 50 nanogram residual glutaral.

6.2 Incompatibilities

The vaccine must not be mixed with other vaccines or medicinal products.

6.3 Shelf Life

48 months.

6.4 Special Precautions for Storage

Store at 2°C to 8°C. Refrigerate. Do not freeze. Do not use after expiry date.

Pre-filled syringe.

Stability data indicate that the vaccine components are stable at temperatures up to 25°C for 72 hours. At the end of this period, Adacel must be used or discarded. It must not be returned to storage. These data are intended to guide healthcare professionals in case of temporary temperature excursion only.

6.5 Nature and Contents of Container

0.5 mL of suspension in pre-filled syringe - pack size of 1 or 10 syringes with or without separate needles.

6.6 Special Precautions for Disposal

After use, any remaining vaccine and container must be disposed of safely according to locally agreed procedures.

6.7 Physicochemical Properties

No data available.

7 Medicine Schedule (Poisons Standard)

S4 - Prescription Only Medicine.

Summary Table of Changes