Children's Allegra Side Effects and Dosing

Relieve your child's seasonal allergies

Allegra 24 Hour Allergy Relief, 180 mg, 45-Count. Credit:

Allegra is an over the counter antihistamine used to treat allergies in children and adults. Children's Allegra is approved to treat seasonal allergic rhinitis (hay fever) in children over the age of 2 and chronic idiopathic urticaria (hives) in children over age 6 months. The active ingredient in Allegra is fexofenadine.

Types of Allegra

Allegra offers a line of many different allergy medications; two are formulated specifically for children: 

  • Children's Allegra Oral Suspension: This liquid form of Allegra provides long-lasting allergy relief and it's non-drowsy. It's safe to treat seasonal allergies in children ages 2 and up, and hives in children over 6 months. It provides 12 hours of relief. A liquid medication is helpful for older children who can't yet swallow pills, and parents who want an alternative  to Claritin, Clarinex, Singulair and Zyrtec.
  • Children's Allegra Meltable Tablets: Melt-in-your-mouth tablets are perfect for kids who don't like liquid medicine or can't swallow pills. These tablets provide 12 hours of relief, are non-drowsy and are safe for kids ages 6 and up.

Because Children's Allegra provides 12 hours of relief, most kids take it twice a day. Before you administer Allegra to your child, know that it can interact with other substances, including:

  • Erythromycin
  • Ketoconazole
  • Magnesium
  • Antacids such as Maalox
  • Certain fruit juices

    Do not take other medications that contain erythromycin, ketoconazole or magnesium, or drink certain fruit juices, while taking Allegra. Doing so can increase the risk of Allegra's side effects.

    Allegra Dosing Instructions

    Children 6 to 23 months with chronic idiopathic urticaria are usually given 1/2 teaspoon twice a day, increasing to 1 teaspoon twice a day for children between the ages of 2 and 11 years of age.

    Children 2 to 11 years are usually given 1 teaspoon twice a day for seasonal allergic rhinitis.

    Older children between the ages of 6 and 11 years of age who can swallow a pill can take a 30 milligram Allegra tablet twice a day instead of the Allegra liquid medication. Adults and children 12 years and older can take a 60 milligram Allegra tablet twice a day or 180 milligram once a day for chronic idiopathic urticaria or seasonal allergic rhinitis.

    Allegra tablets should be taken with water and not fruit juice, such as grapefruit, orange or apple juice.

    Side Effects of Allegra

    Allegra users rarely experience side effects and, if they do, they are usually pretty mild. Still, if your child takes Allegra and is experiencing any of the symptoms listed below, you should call your doctor immediately. Known side effects of Allegra include:

    • Drowsiness
    • Headache
    • Vomiting
    • Fever
    • Muscle or back pain
    • Cough
    • Ear infection
    • Runny nose
    • Nausea
    • Diarrhea
    • Upper respiratory infection

    What to Do If Allegra Doesn't Work

    If Allegra does not work for your child, try one of the many alternative allergy medications, including Claritin, Clarinex, Zyrtec, and Singulair.

    If your child is old enough, your doctor may also prescribe a steroid nasal spray such as Flonase, Nasonex or Rhinocort Aqua

    See Also

    Sources: Retrieved April 11, 2016, from

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