Lidocaine and Tetracaine

Pediatric Medication

Brand Names: US

Pliaglis; Synera

What is this drug used for?

  • It is used to numb an area of the skin before care.

What do I need to tell the doctor BEFORE my child takes this drug?

  • If your child has an allergy to this drug or any part of this drug.
  • If your child is allergic to any drugs like this one or any other drugs, foods, or other substances. Tell the doctor about the allergy and what signs your child had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
This drug may interact with other drugs or health problems.
Tell the doctor and pharmacist about all of your child’s drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for your child to take this drug with all of his/her drugs and health problems. Do not start, stop, or change the dose of any drug your child takes without checking with the doctor.

What are some things I need to know or do while my child takes this drug?

  • Tell dentists, surgeons, and other doctors that your child is using this drug.
  • Do not let your child scratch or rub the skin while it is numb. Do not let the skin get very hot or very cold.
  • Use care when putting on a large part of the skin or where there are open wounds. Talk with the doctor.
  • The patch may have metal. Take off your child’s patch before an MRI.
  • Do not put on cuts, scrapes, eczema, or damaged skin.
  • Be careful about vaccines while your child is getting this drug.
  • This drug may cause harm if chewed or swallowed. If this drug has been put in the mouth, call a doctor or poison control center right away.

If your child is pregnant or breast-feeding a baby:

  • Talk with the doctor if your child is pregnant, becomes pregnant, or is breast-feeding a baby. You will need to talk about the benefits and risks of using this drug.

What are some side effects that I need to call my child’s doctor about right away?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your child’s doctor or get medical help right away if your child has any of the following signs or symptoms that may be related to a very bad side effect:
  • Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
  • Signs of methemoglobinemia like a blue or gray color of the lips, nails, or skin; a heartbeat that does not feel normal; seizures; very bad dizziness or passing out; very bad headache; feeling very sleepy; feeling tired or weak; or shortness of breath.
  • Very bad skin irritation.
  • Burning.
  • Feeling of warmth.
  • Feeling cold.
  • Trouble breathing, slow breathing, or shallow breathing.
  • Change in thinking clearly and with logic.
  • Mood changes.
  • Very nervous and excitable.
  • Twitching.
  • Shakiness.
  • Upset stomach or throwing up.
  • Ringing in ears.
  • Change in eyesight.

What are some other side effects of this drug?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your child’s doctor or get medical help if any of these side effects or any other side effects bother your child or do not go away:
  • Skin irritation.
  • Pale skin, redness, or swelling where the patch is put on.
These are not all of the side effects that may occur. If you have questions about side effects, call your child’s doctor. Call your child’s doctor for medical advice about side effects.
You may report side effects to your national health agency.

How is this drug best given?

Give this drug as ordered by your child’s doctor. Read all information given to you. Follow all instructions closely.
  • This drug is used on the skin.
  • Keep out of your child’s eyes.
  • Your child’s doctor will put on the skin.
  • Do not use coverings (bandages, dressings, make-up) unless told to do so by the doctor.

What do I do if my child misses a dose?

  • Call your child’s doctor to find out what to do.

How do I store and/or throw out this drug?

  • This drug will be given to your child in a hospital or doctor’s office. You will not store it at home.

General drug facts

  • If your child’s symptoms or health problems do not get better or if they become worse, call your child’s doctor.
  • Do not share your child’s drug with others and do not give anyone else’s drug to your child.
  • Keep a list of all your child’s drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your child’s doctor.
  • Talk with your child’s doctor before giving your child any new drug, including prescription or OTC, natural products, or vitamins.
  • Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
  • Check with your pharmacist about how to throw out unused drugs.
  • Some drugs may have another patient information leaflet. If you have any questions about this drug, please talk with your child’s doctor, pharmacist, or other health care provider.
  • If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

Consumer Information Use and Disclaimer

This information should not be used to decide whether or not to take this medicine or any other medicine. Only the healthcare provider has the knowledge and training to decide which medicines are right for a specific patient. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from the healthcare provider. You must talk with the healthcare provider for complete information about the risks and benefits of using this medicine.

Last Reviewed Date



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Lidocaine and Tetracaine
©2015 Memorial Sloan Kettering Cancer Center - Generated on October 4, 2015