diphtheria, tetanus, acellular pertussis vaccine (DTaP)

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Pronunciation: dif THEER ee uh, TET a nus, ay SEL yoo ler per TUS iss

Brand: Daptacel (DTaP), Infanrix (DTaP), Infanrix (DTaP) Preservative Free, Tripedia (DTaP)

What is the most important information I should know about diphtheria, tetanus, acellular pertussis vaccine?

This vaccine is given in a series of shots. The first shot is usually given when the child is 2 months old. The booster shots are then given at 4 months, 6 months, 15 months, and 18 months of age, and again between 4 and 6 years of age. Your child's booster schedule may be different from these guidelines. Follow your doctor's instructions or the schedule recommended by your local health department.

Be sure your child receives all recommended doses of this vaccine. Your child may not be fully protected against disease if he or she does not receive the full series.

Your child can still receive a vaccine if he or she has a minor cold. In the case of a more severe illness with a fever or any type of infection, wait until the child gets better before receiving this vaccine.

Your child should not receive a booster vaccine if he or she had a life-threatening allergic reaction after the first shot.

Keep track of any and all side effects your child has after receiving this vaccine. When the child receives a booster dose, you will need to tell the doctor if the previous shot caused any side effects.

Becoming infected with diphtheria, pertussis, or tetanus is much more dangerous to your child's health than receiving this vaccine. However, like any medicine, this vaccine can cause side effects but the risk of serious side effects is extremely low.

What is diphtheria, tetanus, acellular pertussis vaccine?

Diphtheria, tetanus, and pertussis are serious diseases caused by bacteria.

Diphtheria causes a thick coating in the nose, throat, and airways. It can lead to breathing problems, paralysis, heart failure, or death.

Pertussis (whooping cough) causes coughing so severe that it interferes with eating, drinking, or breathing. These spells can last for weeks and can lead to pneumonia, seizures (convulsions), brain damage, and death.

Tetanus (lockjaw) causes painful tightening of the muscles, usually all over the body. It can lead to "locking" of the jaw so the victim cannot open the mouth or swallow. Tetanus leads to death in about 1 out of 10 cases.

Diphtheria and pertussis are spread from person to person. Tetanus enters the body through a cut or wound.

The diphtheria, tetanus acellular, and pertussis pediatric vaccine (also called DTaP) is used to help prevent these diseases in children who are ages 6 weeks to 6 years old (before the child has reached his or her 7th birthday).

This vaccine works by exposing your child to a small dose of the bacteria or a protein from the bacteria, which causes the body to develop immunity to the disease. This vaccine will not treat an active infection that has already developed in the body.

Like any vaccine, the DTaP vaccine may not provide protection from disease in every person.

What should I discuss with my healthcare provider before receiving this vaccine?

Your child should not receive this vaccine if he or she has ever had a life-threatening allergic reaction to any vaccine containing diphtheria, pertussis, or tetanus, or if the child has:

  • severe or uncontrolled epilepsy or other seizure disorder; or
  • if the child has received cancer chemotherapy or radiation treatment in the past 3 months.

Your child may not be able to receive this vaccine if he or she has ever received a similar vaccine that caused any of the following:

  • a very high fever (over 104 degrees);
  • a neurologic disorder or disease affecting the brain;
  • excessive crying for 3 hours or longer;
  • fainting or going into shock;
  • seizure (convulsions); or
  • Guillain-Barré syndrome (within 6 weeks after receiving a vaccine containing tetanus).

Before receiving this vaccine, tell the doctor if your child has:

  • a bleeding or blood clotting disorder such as hemophilia or easy bruising;
  • a history of seizures;
  • a neurologic disorder or disease affecting the brain (or if this was a reaction to a previous vaccine);
  • a weak immune system caused by disease, bone marrow transplant, or by using certain medicines or receiving cancer treatments; or
  • if the child is taking a blood thinner such as warfarin (Coumadin); or
  • if it has been less than 4 weeks since the child last received a DTaP vaccine.

Your child can still receive a vaccine if he or she has a minor cold. In the case of a more severe illness with a fever or any type of infection, wait until the child gets better before receiving this vaccine.

The pediatric version of this vaccine (Daptacel, Infanrix, Tripedia) should not be given to anyone over the age of 6 years old. Another vaccine is available for use in older children and adults.

How is this vaccine given?

This vaccine is injected into a muscle. Your child will receive this injection in a doctor's office or clinic setting.

This vaccine is given in a series of shots. The first shot is usually given when the child is 2 months old. The booster shots are then given at 4 months, 6 months, 15 months, and 18 months of age, and again between 4 and 6 years of age. Your child's booster schedule may be different from these guidelines. Follow your doctor's instructions or the schedule recommended by your local health department.

Your doctor may recommend treating fever and pain with an aspirin-free pain reliever such as acetaminophen (Tylenol) or ibuprofen (Motrin, Advil, and others) when the shot is given and for the next 24 hours. Follow the label directions or your doctor's instructions about how much of this medicine to give your child.

It is especially important to prevent fever from occurring in a child who has a seizure disorder such as epilepsy.

What happens if I miss a dose?

Contact your doctor if you will miss a booster dose or if you get behind schedule. The next dose should be given as soon as possible. There is no need to start over.

Be sure your child receives all recommended doses of this vaccine. Your child may not be fully protected if he or she does not receive the full series.

What happens if I overdose?

An overdose of this vaccine is unlikely to occur.

What should I avoid before or after receiving this vaccine?

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

What are the possible side effects of diphtheria, tetanus, acellular pertussis vaccine?

Your child should not receive a booster vaccine if he or she had a life-threatening allergic reaction after the first shot.

Keep track of any and all side effects your child has after receiving this vaccine. When the child receives a booster dose, you will need to tell the child's doctor if the previous shot caused any side effects.

Becoming infected with diphtheria, pertussis, or tetanus is much more dangerous to your child's health than receiving this vaccine. However, like any medicine, this vaccine can cause side effects but the risk of serious side effects is extremely low.

Get emergency medical help if your child has any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if the child has a serious side effect such as:

  • extreme drowsiness, fainting;
  • fussiness, irritability, crying for an hour or longer;
  • seizure (black-out or convulsions); or
  • high fever.

Less serious side effects include:

  • mild fever or chills;
  • redness, pain, tenderness, or swelling where the shot was given;
  • mild fussiness or crying;
  • joint pain, body aches;
  • loss of appetite; or
  • mild nausea, diarrhea, or vomiting.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report vaccine side effects to the US Department of Health and Human Services at 1-800-822-7967.

What other drugs will affect diphtheria, tetanus, acellular pertussis vaccine?

Before receiving this vaccine, tell the doctor about all other vaccines your child has recently received.

Also tell the doctor if your child has recently received drugs or treatments that can weaken the immune system, including:

  • an oral, nasal, inhaled, or injectable steroid medicine;
  • medications to treat psoriasis, rheumatoid arthritis, or other autoimmune disorders, such as azathioprine (Imuran), efalizumab (Raptiva), etanercept (Enbrel), leflunomide (Arava), and others; or
  • medicines to treat or prevent organ transplant rejection, such as basiliximab (Simulect), cyclosporine (Sandimmune, Neoral, Gengraf), muromonab-CD3 (Orthoclone), mycophenolate mofetil (CellCept), sirolimus (Rapamune), or tacrolimus (Prograf).

This list is not complete and other drugs may interact with this vaccine. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor.

Where can I get more information?

Your doctor or pharmacist can provide more information about this vaccine. Additional information is available from your local health department or the Centers for Disease Control and Prevention.


Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

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