This information from Lexicomp® explains what you need to know about this medication, including what it’s used for, how to take it, its side effects, and when to call your healthcare provider.
Brand Names: US
Allegra Allergy Childrens [OTC]; Allegra Allergy [OTC]; Allegra Hives 24HR [OTC]; Allergy 24-HR [OTC]; Allergy Childrens [OTC]; Allergy Relief [OTC]; Allergy Relief/Indoor/Outdoor [OTC]; FT Allergy Relief 12 Hour [OTC]; FT Allergy Relief 24 Hour [OTC]; FT Allergy Relief [OTC]
What is this drug used for?
- It is used to ease allergy signs.
- It is used to treat hives.
What do I need to tell the doctor BEFORE my child takes this drug?
- If your child is allergic to this drug; any part of this drug; or any other drugs, foods, or substances. Tell the doctor about the allergy and what signs your child had.
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 to give this drug with all of your child’s other 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?
For all uses of this drug:
- 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.
- Do not use more often or for longer than you were told by the doctor or on the product label.
- This drug may affect certain lab tests. Tell all of your child’s health care providers and lab workers that your child takes this drug.
- Alcohol may interact with this drug. Be sure your child does not drink alcohol.
- Talk with your child’s doctor before your child uses marijuana, other forms of cannabis, or prescription or OTC drugs that may slow your child’s actions.
- If your child drinks grapefruit juice or eats grapefruit often, talk with your child’s doctor.
- If your child has phenylketonuria (PKU), talk with your child’s doctor. Some products have phenylalanine.
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 to your child and the baby.
For hives:
- The doctor may give you another drug (epinephrine) to give in case of a severe allergic reaction that can happen with hives. Keep it with your child at all times. Be sure you know how and when to give it. Do not give this drug instead of the epinephrine to treat a severe allergic reaction.
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, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
- Dizziness or passing out.
- Drooling.
- Flushing.
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:
- Headache.
- Throwing up.
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.
All products:
- Avoid giving this drug with fruit juice.
- Do not give antacids that have magnesium or aluminum at the same time as this drug. Talk with the doctor or pharmacist.
Tablets:
- Give this drug with a full glass of water.
Oral-disintegrating tablet:
- Give this drug on an empty stomach. Give at least 1 hour before or 2 hours after a meal.
- Do not remove the tablet from the tablet pack until you are ready to put in this drug. Put in the tablet right away after opening the blister pack. Do not store the removed tablet for future use.
- Do not push the tablet out of the foil when opening. Use dry hands to take it from the foil. Place on your child’s tongue and let it dissolve. Water is not needed. Do not let your child swallow it whole. Do not let your child chew, break, or crush it.
Liquid (suspension):
- Shake well before use.
- Measure liquid doses carefully. Use the measuring device that comes with this drug. If there is none, ask the pharmacist for a device to measure this drug.
What do I do if my child misses a dose?
- 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.
How do I store and/or throw out this drug?
- Store at room temperature 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.
- Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.
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.
- Some drugs may have another patient information leaflet. If you have any questions about this drug, please talk with your child’s doctor, nurse, 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 generalized information is a limited summary of diagnosis, treatment, and/or medication information. It is not meant to be comprehensive and should be used as a tool to help the user understand and/or assess potential diagnostic and treatment options. It does NOT include all information about conditions, treatments, medications, side effects, or risks that may apply to a specific patient. It is not intended to be medical advice or a substitute for the medical advice, diagnosis, or treatment of a health care provider based on the health care provider’s examination and assessment of a patient’s specific and unique circumstances. Patients must speak with a health care provider for complete information about their health, medical questions, and treatment options, including any risks or benefits regarding use of medications. This information does not endorse any treatments or medications as safe, effective, or approved for treating a specific patient. UpToDate, Inc. and its affiliates disclaim any warranty or liability relating to this information or the use thereof. The use of this information is governed by the Terms of Use, available at https://www.wolterskluwer.com/en/know/clinical-effectiveness-terms.
Last Reviewed Date
2023-01-17
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