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What is Allegra?

Allegra is made up of Fexofenadine, which is an antihistamine. We carry both the brand and the generic alternative (sold as the active Allegra fexofenidine). The brand choice Allegra is available in 60mg, 120mg, and 180mg and in both Allegra and Allegra 12 hour. The generic alternative, Fexofenadine, is available in 180mg. Both come in oral tablet form and can come in a few different appearances (shape and color) depending on if you buy brand name or generic.

What is Allegra used for?

Allegra is used mainly for the treatment of symptoms that follow seasonal allergies, as well as symptoms caused by chronic idiopathic urticaria. Both of these conditions have symptoms such as itchy skin and hives.

How does Allegra work?

Fexofenadine works by blocking and reducing the effect of histamine in your body. Histamine is a natural chemical created by basophils (white blood cells) and mast cells which cause the symptoms of allergic reaction (itching, water eyes, sneezing and runny nose).

Always follow directions given to you by your doctor. Never take more or less of a dosage than directed and do not stop taking this medication before consulting your doctor.

Swallow the tablet whole with a full glass of water. Do not crush, chew, or break it in half.


Tell your doctor, as well as your dentist, about all medications you are currently taking including prescription, over-the-counter, vitamins, and herbal remedies

Tell your doctor if you are pregnant or plan on becoming pregnant; Allegra should only be used if it’s clearly needed. Do not breastfeed while on this medication.

Tell your doctor if you have had a history with kidney disease.

Caution is advised if you are a patient with diabetes, phenylketonuria (PKU), or any other condition that requires you to limit/avoid sugar and aspartame.

Side Effects

Not all side effects have been listed

More common


Less common

  • Back pain
  • body aches or pain
  • chills
  • coughing
  • diarrhea

Contact your doctor right away if you experience;

Chest tightness feeling of warmth, redness of the face, neck, arms and occasionally, upper chest large, hive-like swelling on face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs shortness of breath, difficult or labored breathing


What should I avoid with on this medication?

Avoid using antacids for 15 minutes after taking Allegra. Otherwise it is harder for your body to absorb Allegra.


What are the signs of overdose?

Dry mouth, dizziness and/or drowsiness are all signs of an overdose. If you see these signs, seek medical attention immediately.


Is this product safe for kids?

Yes, for children 6 years and older.

Children 6-11 will need a smaller dose than those 12 and up.


Are there any food or drink interactions?

Fruit juice (including grapefruit, oranges and apples) could cause less effectiveness.

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