Understanding Allegra 120: Uses, Dosage, and Side Effects



Allegra 120, also known as fexofenadine, is a commonly prescribed medication for allergic rhinitis and urticaria. It belongs to a class of medications called antihistamines, which work by blocking the action of histamine – a substance in the body that causes allergy symptoms. In this article, we will delve into the uses, dosage, and side effects of Allegra 120 to provide a comprehensive understanding of this medication.

Uses of Allegra 120

1. Allergic Rhinitis: Allegra 120 is primarily used to treat symptoms associated with allergic rhinitis, commonly known as hay fever. These symptoms include sneezing, runny nose, itching, and watery eyes caused by seasonal allergies or environmental allergens such as pollen, dust mites, or pet dander.

2. Urticaria: Allegra 120 is also effective in managing symptoms of urticaria, commonly referred to as hives. Urticaria presents as red, raised welts on the skin that are often itchy and can appear due to allergic reactions, insect bites, or other triggers.

Dosage of Allegra 120

The standard dosage of Allegra 120 is one tablet (120 mg) taken once daily with a full glass of water. It is essential to follow the prescription provided by your healthcare provider or the instructions on the medication label.

Important Points to Note:

  • Allegra 120 is usually taken on an empty stomach for optimal absorption.
  • Avoid taking Allegra with fruit juices, as they may decrease the effectiveness of the medication.
  • Do not crush, chew, or break the tablet; swallow it whole.
  • If you miss a dose, take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule.

Side Effects of Allegra 120

While Allegra 120 is generally considered safe and well-tolerated, like any medication, it can cause side effects in some individuals. The most common side effects associated with Allegra 120 include:

  • Headache
  • Nausea
  • Drowsiness
  • Fatigue
  • Dry mouth

If these side effects persist or worsen, it is advisable to consult your healthcare provider. In rare cases, Allegra 120 may lead to serious side effects such as allergic reactions, rash, swelling, or difficulty breathing. If you experience any severe symptoms, seek immediate medical attention.

Precautions and Interactions

Before taking Allegra 120, inform your healthcare provider about any medical conditions you have, including kidney problems or allergies. Additionally, disclose all medications you are currently taking, including prescription, over-the-counter, herbal, or supplemental medications, to avoid potential interactions.

Allegra 120 may interact with certain medications such as erythromycin or ketoconazole, affecting their effectiveness or increasing the risk of side effects. It is crucial to discuss these potential interactions with your healthcare provider to ensure safe and effective use of Allegra 120.

Frequently Asked Questions (FAQs)

Q1: Can I take Allegra 120 if I have kidney problems?
A: Individuals with kidney problems should consult their healthcare provider before taking Allegra 120, as dosage adjustments may be necessary based on the severity of the condition.

Q2: Is Allegra 120 safe for children?
A: Allegra 120 is approved for children above the age of 12 years. Pediatric dosages may vary, and it is essential to follow the guidance of a healthcare provider.

Q3: Can I take Allegra 120 with food?
A: While Allegra 120 is usually taken on an empty stomach for optimal effectiveness, it can be taken with food if gastrointestinal discomfort occurs.

Q4: What should I do if I experience drowsiness after taking Allegra 120?
A: If you experience drowsiness or dizziness after taking Allegra 120, avoid activities that require alertness such as driving or operating machinery until the symptoms subside.

Q5: Can I take Allegra 120 with other antihistamines?
A: It is not recommended to take multiple antihistamines simultaneously, as this may increase the risk of side effects and interactions. Consult your healthcare provider before combining antihistamines.

Q6: Is Allegra 120 available over-the-counter?
A: Allegra 120 is available both as a prescription and over-the-counter medication. However, it is advisable to seek medical advice before starting any new medication regimen.

Q7: How long does it take for Allegra 120 to start working?
A: Allegra 120 typically starts providing relief within 1 to 3 hours after administration. However, individual responses may vary.

Q8: Can I take Allegra 120 if I am pregnant or breastfeeding?
A: Pregnant or breastfeeding individuals should consult their healthcare provider before taking Allegra 120 to assess the potential risks and benefits of the medication.

Q9: What should I do if I accidentally overdose on Allegra 120?
A: If you suspect an overdose of Allegra 120, seek immediate medical attention or contact a poison control center for assistance.

Q10: How long can I take Allegra 120 for allergic rhinitis or urticaria?
A: The duration of Allegra 120 treatment for allergic rhinitis or urticaria should be determined by a healthcare provider based on individual symptoms and response to the medication.

In conclusion, Allegra 120 is a widely used antihistamine effective in managing symptoms of allergic rhinitis and urticaria. By understanding its uses, dosage, side effects, and precautions, individuals can safely and effectively incorporate Allegra 120 into their allergy management regimen under the guidance of a healthcare provider.


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