Warfarin

Pediatric Medication

Brand Names: US

Coumadin; Jantoven

Brand Names: Canada

Apo-Warfarin; Coumadin; Mylan-Warfarin; Novo-Warfarin; Taro-Warfarin

Warning

  • This drug may cause very bad and sometimes deadly bleeding. Talk with the doctor.
  • Have your child’s blood work (PT/INR) checked as told by the doctor. This is important to make sure the drug works right and to check your child’s risk of bleeding problems.
  • Your child’s diet and certain drugs may affect your child’s PT/INR level. Talk with the doctor.
  • Avoid actions or sports that may raise the chance of injury or bleeding.
  • Call the doctor right away if your child has any signs of bleeding problems, like bruising; black, tarry, or bloody stools; bleeding gums; blood in the urine; coughing up blood; cuts that take a long time to stop bleeding; feeling dizzy; feeling very tired or weak; nosebleeds; pain or swelling; throwing up blood or throw up that looks like coffee grounds; or very bad headache.
  • Call the doctor right away if your child has vaginal bleeding that is not normal or very heavy periods (menstrual bleeding).

What is this drug used for?

  • It is used to treat blood clots.
  • It is used to lower the chance of blood clots that cause certain health problems like heart attack or stroke.

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.
  • If your child has any of these health problems: Blood vessel problems like aneurysm or dissecting aorta; bleeding problems; bleeding in the brain; active ulcer; bleeding of the stomach, bowel, urinary tract, genitals, or respiratory tract; blood problems; heart infection; low platelet count; pericarditis; recent surgery of the eye, brain, or spine; or very high blood pressure.
  • If your child is having surgery, talk with the doctor.
  • Tell your child’s doctor he/she uses this drug before he/she gets spinal anesthesia or a spinal treatment.
  • If your child has had spinal anesthesia, surgery, or any spinal care, talk with your child’s doctor.
  • If you know that you cannot give this drug or your child cannot take this drug as told by the doctor.
  • If your child is pregnant or may be pregnant.
This is not a list of all drugs or health problems that interact with this drug.
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 their 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.
  • Use care to prevent your child from getting hurt and have your child avoid falls or crashes.
  • If your child falls or hurts himself/herself, or hits his/her head, call the doctor right away.
  • Your child may bleed more easily. Make sure your child is careful and avoids injury. Be sure your child has a soft toothbrush.
  • If your child drinks grapefruit juice or eats grapefruit often, talk with your child’s doctor.
  • Talk with the doctor before giving your child products that have aspirin, blood thinners, garlic, ginseng, ginkgo, ibuprofen or like products, pain drugs, or vitamin E.
  • Talk to your child’s doctor before giving your child multivitamins, natural products, and diet aids. These may have vitamin K in them.
  • Talk with the doctor about the amount of vitamin K in your child’s diet. Vitamin K may change how this drug works. Your child does not have to avoid all foods with vitamin K. However, you will need to keep the amount of foods with vitamin K in your child’s diet about the same from day to day. Many foods have vitamin K in them. This includes some green, leafy vegetables; broccoli; liver; and certain vegetable oils. Get a list of foods that have vitamin K in them from your child’s doctor. Do not make big changes in your child’s normal diet without talking with the doctor.
  • Have your child follow the diet and workout plan your child’s doctor told you about.
  • Alcohol may interact with this drug. Be sure your child does not drink alcohol.
  • If your child stops or starts smoking, talk with the doctor. How much drug your child takes may need to be changed.
  • If your child is of Asian descent, use this drug with care. Your child could have more side effects.

If your child is able to get pregnant:

  • Have your child use birth control to prevent pregnancy while taking this drug.

If your child is or may be pregnant:

  • This drug may cause harm to the unborn baby if your child takes it during pregnancy. If your child gets pregnant while taking this drug, call the doctor right away.

If your child is breast-feeding a baby:

  • Tell the doctor if your child is breast-feeding a baby. You will need to talk about any risks to the baby.

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.
  • Change in strength on 1 side is greater than the other, trouble speaking or thinking, change in balance, or blurred eyesight.
  • Chest pain.
  • Very bad dizziness or passing out.
  • Swelling, warmth, numbness, change of color, or pain in a leg or arm.
  • Very bad headache.
  • Change in skin color to black or purple.
  • Pain, color, or temperature change in any part of your body.
  • Feeling very tired or weak.
  • Swelling.

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 your child has any side effects that bother your child or do not go away.
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 and follow the dosing on the label closely.

Oral and shot:

  • Give this drug exactly as you have been told, even if your child feels well. This is important for the drug to work right and to lower the risk of bleeding.
  • Give this drug at the same time of day.
  • To gain the most benefit, do not miss giving your child doses.

Oral:

  • Give this drug with or without food.

Shot:

  • It may be given as a shot into a vein.

What do I do if my child misses a dose?

Oral:

  • Give a missed dose as soon as you think about it on the same day your child missed the dose.
  • If it is close to the time for your child’s next dose, skip the missed dose and go back to your child’s normal time.
  • Do not give 2 doses at the same time or extra doses.

Shot:

  • Call the doctor to find out what to do.

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

Tablets:

  • Store at room temperature.
  • Protect from light.
  • Store in a dry place. Do not store in a bathroom.
  • Keep all drugs out of the reach of children and pets.
  • Check with your pharmacist about how to throw out unused drugs.

Shot:

  • The shot 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.
  • 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

2015-01-08

Copyright

Copyright © 2014 Clinical Drug Information, LLC and Lexi-Comp, Inc.
If you have any questions or concerns, talk with a member of your healthcare team. You can reach them Monday through Friday from 9:00 am to 5:00 pm at ____________________. After 5:00 pm, during the weekend, and on holidays, please call____________________. If there’s no number listed, or you’re not sure, call 212-639-2000.
Warfarin
©2015 Memorial Sloan Kettering Cancer Center - Generated on July 7, 2015