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Allegra 180 Mg

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Dr. Akansha is a licensed Clinical Pharmacologist with extensive expertise in pharmacovigilance, prescription analysis, drug information, and safety. She's a dedicated educator and avid learner. Dr. Akansha also reviews medical content on GoodRx Medicine, ensuring accurate pharmaceutical information is accessible to all.

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julian-carter Julian Carter

Julian, an MBA in Pharmaceutical Management, brings a dynamic blend of expertise and impact with his contributions at Goodrxmedicine. His dedication and innovative spirit continue to shape a brighter future in pharmaceutical management.

About Allegra 180 mg

Allegra 180 is an effective anti-allergy medication.

Fexofenadine, the active salt in Allegra, treats allergy symptoms such as runny nose, congestion or stuffiness, sneezing, itching, swelling, and watery eyes.

Sanofi India Ltd. manufactures Allegra tablets with Fexofenadine 180 mg.

Get it delivered to your doorstep. You can order Allegra 180 mg online with GoodRxmedicine, the most trusted online pharmacy.


Allegra 180 mg is used in treating the following conditions:

Allergic Rhinitis

Hay fever or Allergic Rhinitis is a condition that causes inflammation of the nasal interior. It may cause symptoms such as runny nose, itchy and watery eyes, sneezing, and occasionally eye swelling.

Chronic Utricaria

Urticaria, also known as Hives, are itchy rashes formed on the skin. It can occur by an allergic reaction to food, medications (certain Antibiotics, non-steroidal anti-inflammatory drugs, and ACE inhibitors), or environmental irritants. 

Typically, these rashes disappear on their own. Allegra 180 mg treats skin allergy symptoms such as red and itchy rashes, raised bumps, etc.

Fexofenadine 180 mg tablet can also be recommended for below mentioned medical issues:

  • Eczema
  • Conjunctivitis
  • Insect bites and stings

How does Fexofenadine 180 mg work

Fexofenadine belongs to the group of medications called Antihistamines.

It works by blocking the effects of Histamine, a substance in the body that causes allergy symptoms.

Histamine is typically produced when the body detects a threat, such as an infection. It causes blood vessels to dilate and skin to swell, thereby defending the body.

In people with allergies, however, the body mistakes harmless substances, such as pollen, house dust, and animal hair, for a threat and produces Histamine.

The Histamine causes an allergy with symptoms including itchy, watery eyes, a runny or blocked nose, sneezing, and rashes on the skin.

You can prevent this reaction if you take Antihistamines like Fexofenadine 180 mg before coming into contact with the allergen.


Keep the following points in mind when taking Allegra 180:

Take these tablets in the dose and duration as advised by your physician

Swallow it as a whole. Do not chew, crush or break Fexofenadine 180 mg tablet

Allegra 180 mg can be taken with or without food but should be taken at a fixed time

Missed Dose

Take your Allegra 180 mg tablet dose. If you forget to take a medication dose, take it as soon as you remember.

However, if it is time for your next dose, you should not double the dose to compensate for the missed one.


Never exceed the recommended dosage. 

If you suspect you've taken an Allegra 180 mg overdose, seek immediate medical attention or contact your doctor immediately. 

Overdose symptoms may include vertigo, restlessness, and confusion.

Side Effects

180 mg tablets of Allegra may cause side effects in some people. Some of the side effects are

  • Coughing
  • Drowsiness
  • Diarrhea
  • Dizziness
  • Swelling of the face, lips, eyelids, tongue, hands and feet
  • Headache
  • Pain in the arms and legs
  • Painful menstruation,
  • Difficulty in breathing


It will help if you inform your doctor of any medications, herbal supplements, or vitamin supplements you take.

Here are a few Allegra 180 interactions:

Drug Interactions

Fexofenadine 180 mg may cause interactions when taken with the following medicines:

  • Erythromycin
  • Antacids
  • Rifampicin
  • Ketoconazole

Disease Interactions

Avoid taking Allegra 180 mg tablets if you have the following health conditions:


Keep in mind the following while undergoing treatment:

Fruit juices should not be consumed while taking this medication, as they may reduce the effectiveness of Fexofenadine

Keep a check on your liver and kidney functions while taking Allegra 180

Store it below 30° C, away from children and pets

Allegra 180 mg is not recommended for children under 12

Do not use past the expiration date. Ensure that the unused medication is properly discarded

Frequently Asked Questions

What is Allegra 180mg used for?

Allegra 180mg treats Hay Fever and other seasonal allergic conditions. It helps alleviate nasal allergies (allergic rhinitis), sneezing, runny nose, eye itching, excessively watery eyes, etc.

How many Allegra 180mg can I take?

The recommended dose of Allegra is one tablet per day. However, it should be taken as per your doctor's recommendations. Do not self-medicate.

Is Allegra 180 mg strong?

Allegra 180 mg tablets contain Fexofenadine as the active ingredient. It is an effective and potent anti-allergy medication used to treat Rhinitis (Hay Fever) and Urticaria symptoms, including runny nose, watery eyes, sneezing, itching, hives, etc.

Is Allegra 180 a steroid?

No, Allegra is not a steroid. Allegra with Fexofenadine 180 mg is an Antihistamine medication used to relieve allergy symptoms.

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