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Allegra M Tablet
Uses and Benefits

Uses and Benefits

Allegra M Tablet is used to treat seasonal allergic rhinitis, chronic idiopathic urticaria, chronic asthma, allergic rhinitis, prophylaxis of excise-induced asthma. However, the uses mentioned here are not exhaustive. There may be other conditions for which this medication may be used upon a doctor’s discretion.



The active ingredients of Allegra M Tablet are Montelukast 10mg and Fexofenadine 120mg.

Mechanism of Action of Drugs

Mechanism of Action of Drugs

Montelukast is a leukotriene inhibitor. Leukotrienes are the chemicals in our body which are responsible for the allergies, swelling of lungs, tightening of the muscles around airways results in asthma. Therefore, by blocking leukotrines, helps in reducing allergic reactions and asthma.

Fexofenadine is an antihistamine which acts by blocking histamines. Histamines are released during allergic reactions. Hence, by blocking these, Fexofenadine reduces allergies.

Contraindications and Cautions

Contraindications and Caution

Patients with the following conditions are suggested to seek advice from their health care professional before taking the Allegra M Tablet:

  • Hypersensitivity to any of the ingredients used in the Allegra M Tablet such as Montelukast and Fexofenadine
  • Caution:
  • Renal impairment
  • PKU (phenylalanine-containing forms)
  • Severe asthma
  • PKU (phenyl-alanine
Side Effects

Side and Adverse Effects

The following side effects may or may not occur during the usage of Allegra M Tablet. It is generally well tolerated when taken in the prescribed dosage guidelines. More common ones are generally mild and may include:

  • Headache
  • Dyspepsia
  • Fever
  • Cough
  • URI
  • Myalgia
  • Pain
  • Diarrhea
  • Otitis media
  • Rhinorrhea
  • Dizziness
  • Somnolence
  • Nausea
  • Dyspepsia
  • Rash
  • Urticaria
  • Gastroenterities
  • Sleep disorders
  • Anxiety/irritability
  • Restlessness
  • Tremor

Rare but more serious adverse effects may include:

  • Hypersensitivity reaction
  • Anaphylaxis
  • Skin reaction, severe
  • Hepatic eosinophilic infiltration
  • Pulmonary eosinophilia
  • Churg-strauss syndrome
  • Thrombocytopenia
  • Neuropsychiatric disorder
  • Suicidality
  • Aggressive behaviour
  • Hallucinations
  • Depression
How to Use
How to Use

Do not exceed the dose prescribed by your doctor. Swallow the Allegra M Tablet whole immediately after opening it from the strip. Do not break/crush/chew it instead.

Avoid missing or forgetting a dose. If you do, take it as soon as you remember; but if it is almost time for your next dose, skip it and take it according to your normal schedule. Don’t consume two doses at the same time which may be dangerous to your health.

Take the Allegra Tablet 120mg on an empty stomach.
If you are in a habit of taking tablets along with juices (in order to mask the taste), do not do that for this tablet.
Consume this tablet with warm/lukewarm water only.
Take the medicine at the prescribed time and dosage.


Avoid taking more than the prescribed dosage. In case of an accidental overdose, promptly seek medical advice. Depending on the dosage, symptoms may vary but you may experience one or more of the following signs or symptoms:

  • Dizziness
  • Drowsiness
  • Fatigue
  • Dry mouth
  • Abdominal pain
  • Somnolence
  • Thirst
  • Headache
  • Vomiting
  • Psychomotor hyperactivity
Warnings and Precautions

Warnings and Precautions

Take Allegra M Tablet only on the advice of a medical practitioner. Dosage adjustment or complete avoidance of the medication may be required in the following conditions:


Caution advised among people with renal problems. If you have any, consult your doctor before the consumption of Allegra Tablet 120mg.


Caution advised among people with hepatic problems. If you have any, consult your doctor before the consumption of Allegra Tablet 120mg.


Safety during pregnancy is unknown. Therefore, if you are pregnant or planning to become pregnant, inform your doctor before consuming this tablet.


Safety during lactation has not yet established. Therefore, inform your doctor if you are a nursing mother, before consuming this medicine.


Do not take the medicine with fruit juices such as apple, orange, and grape, these may makes your body harder to absorb the drug.

Drug Interactions:

Caution always advised when used with other drugs. Therefore, inform your doctor about your current list of medications (if any) during the treatment. Especially, avoid consuming an antacid within 2 hours before or after you take the Allegra M Tablet because it makes your body tough to absorb the drug.

  • Keep the medicine out of sight and reach of children.
  • Store at room temperature away from heat and moisture.
  • Do not use Allegra M Tablet beyond its expiry.
FDA Pregnancy Category

FDA Pregnancy Category

Category C: Animal reproduction studies have shown an adverse effect on the fetus and there are no adequate and well-controlled studies in humans, but potential benefits may warrant the use of the drug in pregnant women despite potential risks.

Drug Composition information
What is Fexofenadine for:

This medication is an antihistamine, prescribed for seasonal allergic reactions such as runny nose, sneezing, red, itchy, or watery eyes; itching. It blocks histamines action, which reduces allergy symptoms.

How does Fexofenadine work:

Fexofenadine lowers or stops the bodys reaction to the allergen.

How should Fexofenadine be used:

Adults: The recommended dose is 60 mg twice daily or 180 mg once daily with water. Children 6 to 11 Years: The recommended dose is 30 mg twice daily with water. It comes as a tablet to take by mouth, with water.

Common side effects of Fexofenadine :

Feeling lightheaded, sleepy, having blurred eyesight, or a change in thinking clearly. Avoid driving and doing other tasks or actions that call for you to be alert or have clear eyesight until you see how this drug affects you. - Headache.

What do I do if I miss a dose

Use a missed dose as soon as you think about it. If it is close to the time for your next dose, skip the missed dose and go back to your normal time. Many times this drug is taken on an as needed basis

What precautions should I take when taking Fexofenadine :

If you have an allergy to fexofenadine or any other part of this drug. Tell your doctor if you are allergic to any drugs. Make sure to tell about the allergy and what signs you had. This includes telling about rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.

When do I need to seek medical help

If you think there was an overdose, call your local poison control center or ER right away. Signs of a very bad reaction to the drug. These include wheezing; chest tightness; fever; itching; bad cough; blue or gray skin color; seizures; or swelling of face, lips, tongue, or throat. Very bad dizziness or passing out. Feeling very tired or weak. Any rash. Side effect or health problem is not better or you are feeling worse.

Can I take Fexofenadine with other medicines:

Sometimes drugs are not safe when you take them with certain other drugs and food. - Taking them together can cause bad side effects. - Be sure to talk to your doctor about all the drugs you take.

Are there any food restrictions

Avoid Alcohol

How do I store Fexofenadine :

Store it at room temperature and in an airtight container.

Pregnancy Category

Category C : Animal reproduction studies have shown an adverse effect on the fetus and there are no adequate and well-controlled studies in humans, but potential benefits may warrant use of the drug in pregnant women despite potential risks.

Therapeutic Classification

Antihistamines & Antiallergics

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