Allegra Allergy


Generic Name: Allegra Allergy Brand Name(s): Generics only. No brands available.


What is Allegra® Allergy used for?

Allegra® Allergy is an antihistamine, which is used to relieve allergy symptoms such as watery eyes, runny nose, itching eyes/nose, sneezing, hives, and itching.

It works by blocking a certain natural substance (histamine) that your body makes during an allergic reaction.

How should I take Allegra® Allergy?

If you are using the liquid form of this medication, shake the bottle well before each dose and measure the dose carefully using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose.

Take the tablet/capsule or liquid form of this medication with or without food. If you are using the rapidly-dissolving tablet, take it on an empty stomach. Allow the rapidly-dissolving tablet to dissolve on the tongue and then swallow, with or without water. Do not remove the tablet from the blister pack until right before using.

If you need a liquid to take this medication (such as when taking the tablets/capsules), then take this medication with water. Do not take with fruit juices (such as apple, grapefruit, or orange) since they may decrease the absorption of this drug.

How do I store Allegra® Allergy?

Allegra® Allergy is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store Allegra® Allergy in the bathroom or the freezer. There may be different brands of Allegra® Allergy that may have different storage needs. It is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.

You should not flush Allegra® Allergy down the toilet or pour them into a drain unless instructed to do so. It is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.

Precautions & warnings

What should I know before using Allegra® Allergy?

Before using this drug, tell your doctor if:

  • You are pregnant or breastfeeding. This is because, while you are expecting or feeding a baby, you should only take medicines on the recommendation of a doctor.
  • You are taking any other medicines. This includes any medicines you are taking which are available to buy without a prescription, such as herbal and complementary medicines.
  • You have allergy with any of active or inactive ingredients of Allegra® Allergy or other medications.
  • You have any other illnesses, disorders, or medical conditions.

Is it safe during pregnancy or breastfeeding?

There are no adequate studies in women for determining risk when using Allegra® Allergy during pregnancy or while breastfeeding. Please always consult with your doctor to weigh the potential benefits and risks before taking Allegra® Allergy. Allegra® Allergy is pregnancy risk category C, according to the US Food and Drug Administration (FDA).

FDA pregnancy risk category reference below:

  • A=No risk
  • B=No risk in some studies
  • C=There may be some risk
  • D=Positive evidence of risk
  • X=Contraindicated
  • N=Unknown

Side effects

What side effects can occur from Allegra® Allergy?

Some side effects may occur when using this drug, such as:

  • Cough
  • Fever
  • Stomach upset
  • Rash
  • Itching/swelling (especially of the face/tongue/throat)
  • Severe dizziness
  • Trouble breathing

Not everyone experiences these side effects. There may be some side effects not listed above. If you have any concerns about a side-effect, please consult your doctor or pharmacist.


What drugs may interact with Allegra® Allergy?

Allegra® Allergy may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, nonprescription drugs, and herbal products) and share it with your doctor and pharmacist. For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.

Products may interact with this drug, including:

  • Advair Diskus (fluticasone / salmeterol)
  • Aspirin Low Strength (aspirin)
  • Calcium 600 D (calcium / vitamin d)
  • Celebrex (celecoxib)
  • Crestor (rosuvastatin)
  • Cymbalta (duloxetine)
  • Fish Oil (omega-3 polyunsaturated fatty acids)
  • Flonase (fluticasone nasal)
  • Lipitor (atorvastatin)
  • Lyrica (pregabalin)
  • Nasonex (mometasone nasal)
  • Nexium (esomeprazole)
  • Plavix (clopidogrel)
  • ProAir HFA (albuterol)
  • Singulair (montelukast)
  • Synthroid (levothyroxine)
  • Vitamin B12 (cyanocobalamin)
  • Vitamin C (ascorbic acid)
  • Vitamin D3 (cholecalciferol)
  • Xanax (alprazolam)

Does food or alcohol interact with Allegra® Allergy?

Allegra® Allergy may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug.

What health conditions may interact with Allegra® Allergy?

Allegra® Allergy may interact with your health condition. This interaction may worsen your health condition or alter the way the drug works. It is important to always let your doctor and pharmacist know all the health conditions you currently have.

These health conditions are:

  • Kidney disease
  • Diabetes
  • Phenylketonuria (PKU)


The information provided is not a substitute for any medical advice. You should ALWAYS consult with your doctor or pharmacist before using Allegra® Allergy.

What is the dose of Allegra® Allergy for an adult?

Syrup – 12 years old and more

Take 2 teaspoonfuls (10 mL) every 12 hours.

Do not take more than 4 teaspoonfuls (20 mL) in 24 hours.

Tablet – 12 years old and more

Take 2 tablets every 12 hours on an empty stomach.

Do not take more than 4 tablets in 24 hours.

What is the dose of Allegra® Allergy for a child?


Take 1 teaspoonful (5 mL) every 12 hours.

Do not take more than 2 teaspoonfuls (10 mL) in 24 hours.


Take 1 tablet every 12 hours on an empty stomach.

Do not take more than 2 tablets in 24 hours.

How is Allegra® Allergy available?

Allegra® Allergy is available in the following dosage forms and strengths:

  • Syrup
  • Tablet 180mg
  • Oral suspension 30 mg/5 Ml

What should I do in case of an emergency or overdose?

In case of an emergency or an overdose, call your local emergency services or go to your nearest emergency room.

What should I do if I miss a dose?

If you miss a dose of Allegra® Allergy, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.

Hello Health Group does not provide medical advice, diagnosis or treatment.

msBahasa Malaysia

Review Date: May 19, 2017 | Last Modified: May 23, 2017

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