Allegra Allergy 24 Hour Gelcaps Long-Lasting Fast-Acting Antihistamine


$ 24.48 per inhaler

Category: Tablets

Brand: Allegra

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Allegra is an antihistamine preparation used on a systemic basis for the treatment of allergies.

The main active ingredient is fexofenadine. Its main metabolite is terfenadine, an anti-histamine substance that affects the body as a selective peripheral antagonist of H-1 receptors.

Due to the fact that this substance does not have the property of overcoming the blood-brain barrier, fexofenadine does not produce a sedative effect.

The drug has a significant antihistamine effect, preventing allergies.

You should notice an antiallergic effect 60 minutes after taking the tablet, the maximum effect is reached after 6 hours, which lasts for 24 hours.

Regular intake of tablets for 28 days did not cause addiction or weakening of the effect.


  • Seasonal allergic rhinitis (to reduce symptoms);
  • Chronic idiopathic urticaria (to reduce symptoms).

How to take Allegra?

This drug must be prescribed by a doctor.

Adults and children over 12 years:

Tak1 1 tablet one a day.

The duration of treatment depends on the disease, its severity, and the individual response of the body to the drug.


Do not use Allegra I any of the following conditions:

  • hypersensitivity to any component of the drug;
  • pregnancy;
  • lactation period;
  • age under 12 years.

With caution: chronic renal and hepatic insufficiency, elderly patients (lack of clinical experience in this category of patients); cardiovascular diseases, including a history (antihistamines can cause palpitations and tachycardia).

Use during pregnancy and lactation

Pregnancy. There is not enough data on the use of fexofenadine by pregnant women. Limited animal studies have shown no evidence of adverse effects on pregnancy, intrauterine development, childbirth and postnatal development. Fexofenadine should not be used during pregnancy.

Lactation. There are no data on the content of fexofenadine in breast milk when it is taken by breastfeeding women. However, terfenadine can penetrate into the breast milk of lactating women. Therefore, the use of the drug during breastfeeding is not recommended.

Side effects

Allegra rarely causes side effects and is well tolerated.

It can cause the following side effects:

  • headache, dizziness, drowsiness;
  • weakness, fatigue;
  • nausea;
  • allergic reactions in the form of angioedema, rash, itching.


Overdose cases are extremely rare.

In case of acute overdose, accidental excessive ingestion may result in:

  • dizziness, drowsiness;
  • fatigue;
  • dry mouth.

In case of an overdose, supportive therapy is required – rinse the stomach, take enterosorbents.


Avoid taking the medicine with any of the following drugs:

  • erythromycin;
  • ketoconazole;
  • antacids containing aluminum or magnesium.

Special instructions

It is recommended that the time interval between taking Allegra and antacids containing aluminum or magnesium hydroxide is at least 2 hours.

Usually, the tablets do not affect concentration and speed of psychomotor reactions (except for patients with a non-standard reaction). Therefore, it is recommended to check the individual reaction to taking fexofenadine before engaging in such activities.

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