- This drug is only to be used to treat life-threatening abnormal heartbeats. It may cause very bad and sometimes deadly side effects. Talk with the doctor.
- Other types of abnormal heartbeats have happened with this drug in some people. Sometimes, this has been deadly. Do not give this drug to your child if your child has a certain type of abnormal heartbeat called chronic atrial fibrillation. Talk with the doctor.
- It is used to treat heartbeats that are not normal.
- 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: Heart block without a working pacemaker, heart failure, a long QT on ECG, low blood pressure, or low potassium or magnesium levels.
- Tell dentists, surgeons, and other doctors that your child is using this drug.
- Have your child avoid tasks or actions that call for alertness until you see how this drug affects your child. These are things like riding a bike, playing sports, or using items such as scissors, lawnmowers, electric scooters, toy cars, or motorized vehicles.
- To lower the chance of feeling dizzy or passing out, have your child get up slowly over a few minutes when sitting or lying down. Have your child be extra careful climbing stairs.
- Have your child’s blood work checked often. Talk with your child’s doctor.
- If your child has a pacemaker, talk with the doctor.
- In children with certain heart problems, heart attack and sudden death have happened with this drug. Talk with the doctor.
- This drug will be started in a hospital where your child will be closely watched. Talk with the doctor.
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.
- 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 liver problems like dark urine, feeling tired, not hungry, upset stomach or stomach pain, light-colored stools, throwing up, or yellow skin or eyes.
- Chest pain or pressure.
- Very bad dizziness or passing out.
- A new or worse heartbeat that does not feel normal.
- Fast or slow heartbeat.
- Shortness of breath, a big weight gain, swelling in the arms or legs.
- Change in eyesight.
- Any bruising or bleeding.
- Give as you have been told, even if your child feels well.
- To gain the most benefit, do not miss giving your child doses.
- Give this drug with or without food.
- Give a missed dose as soon as you think about it.
- 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.
- Store at room temperature.
- Protect from light.
- Store in a dry place. Do not store in a bathroom.
- 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.
- 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.
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
Flecainide©2015 Memorial Sloan Kettering Cancer Center - Generated on October 7, 2015