- This drug may cause very bad and sometimes deadly side effects. These side effects may happen anywhere in the body. Most of the time, they happen in the bowels, liver, skin, and nerves. They may also affect organs that change hormone levels in the body. Side effects that happen in the nerves can lead to not being able to move a part of the body (paralysis). Most of the time, these side effects have happened during the use of this drug but sometimes have happened weeks to months after this drug was stopped. If you have questions, talk with the doctor.
- Have blood work checked as you have been told by the doctor. Talk with the doctor.
- 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.
- Signs of bowel problems like black, tarry, or bloody stools; fever; mucus in the stools; throwing up blood or throw up that looks like coffee grounds; very bad belly pain; or very bad hard stools (constipation) or loose stools (diarrhea).
- Signs of hormone problems like change in how you act, dizziness or passing out, feeling cold all the time, feeling sluggish, lowered interest in sex, memory problems, mood changes, very bad headache, weight gain.
- Signs of a very bad skin reaction (Stevens-Johnson syndrome/toxic epidermal necrolysis) like red, swollen, blistered, or peeling skin (with or without fever); red or irritated eyes; or sores in your mouth, throat, nose, or eyes.
- Signs of nerve problems like a burning, numbness, or tingling feeling that is not normal; weakness; or not being able to move a part of the body (paralysis).
- It is used to treat a type of skin cancer (melanoma).
- 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 is breast-feeding a baby:
- Be sure your child does not breast-feed a baby while taking this drug or for 3 months after her last dose.
- Tell all of your child’s health care providers that your child is taking this drug. This includes your child’s doctors, nurses, pharmacists, and dentists.
- If your child has an upset stomach or loose stools (diarrhea), is throwing up, or is not hungry, talk with the doctor. There may be ways to lower these side effects.
- This drug may be used with another drug called nivolumab. Some side effects that can happen may happen more often if this drug is used with nivolumab. If your child is also using nivolumab, talk with your child’s doctor about the risks and side effects that may happen.
- Talk with the doctor before your child gets any vaccines. Use with this drug may either raise the chance of very bad infection or make the vaccine not work as well.
If your child is or may be sexually active:
- Have your child use birth control to prevent pregnancy while taking this drug and for 3 months after stopping this drug.
If your child is 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 or within 3 months after her last dose, call the doctor right away.
- Signs of thyroid, pituitary, or adrenal gland problems. Some signs may be change in mood or the way you act, change in weight, constipation, deeper voice, dizziness, fainting, feeling cold, feeling very tired, hair loss, headache that lasts or is very bad, or lowered interest in sex.
- Signs of kidney problems like unable to pass urine, change in how much urine is passed, blood in the urine, or a big weight gain.
- Signs of lung or breathing problems like shortness of breath or other trouble breathing, cough, or fever.
- Signs of meningitis like headache with fever, stiff neck, upset stomach, confusion, or if lights bother your eyes.
- Signs of a pancreas problem (pancreatitis) like very bad stomach pain, very bad back pain, or very bad upset stomach or throwing up.
- Any unexplained bruising or bleeding.
- Feeling very tired or weak.
- Change in bowel habits.
- A very bad heart problem (myocarditis) has happened with this drug. Sometimes, this has been deadly. Call your doctor right away if you have a big weight gain, a heartbeat that does not feel normal, chest pain or pressure, fast heartbeat, shortness of breath, swelling in the arms or legs, or very bad dizziness or passing out.
- Eye problems have happened with this drug. Some types of eye problems may need to be treated right away to lower the chance of long-lasting eyesight loss. Call your child’s doctor right away if your child has any changes in eyesight, eye pain, or very bad eye irritation.
- Feeling tired or weak.
- Loose stools (diarrhea).
- Upset stomach or throwing up.
- Not hungry.
- Not able to sleep.
- Weight loss.
- It is given as an infusion into a vein over a period of time.
- Call your child’s doctor to find out what to do.
- If you need to store this drug at home, talk with your child’s doctor, nurse, or pharmacist about how to store it.
- 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.