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4RX Store > Medication List > Allergy drugs > Order Allegra online

Allergy Medication (Allegra)

Generic name:
Brand name:
Allegra is the brand name of the best selling anti-allergy medication worldwide based on Fexofenadine. Although the formulation can be found under other names too since its formula is no longer protected by the copyright. The tablets can be used for the lowering or complete elimination of symptoms of seasonal or year-round rhinitis caused by the response of the body to an allergen and for the chronic urticaria therapy. The medication can be used for treatment of adults and children aged 12 and older. For more info read the following guide.
Chronic urticaria, Allergic rhinitis, Seasonal rhinitis, Allergy-induced runny nose, Allergic stuffy nose, Allergic sneezing.
Effectively reduces the manifestation of allergy.
Aventis Pharma
Aventis Pharma
Fexigra, Fexodin, Fexolup, Carboxyterfenadine, Terfenadine acid metabolite, Terfenadine carboxylate
Allegra (Generic Fexofenadine)
Actual product may differ in
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  Generic Medication guide:

This is a medication you can find in the allergy section of our online pharmacy because it is an antihistamine. The drug helps in various manifestations of allergy which is an inadequate immune response to harmless substances such as certain types of food, pollen, and so on. Antihistamines perform competitive blockage of histamine receptors which leads to the weakening of the effects mediated by these receptors.

What exactly is sold under the commercial name Allegra?

The brand name Allegra is registered and promoted by a certain company for the formulation registered internationally as Fexofenadine. Fexofenadine is a metabolite of terfenadine, devoid of cardiotoxic properties. It is classified as an H1-receptor blocker for histamine of the second or the third generation which means that it lacks the main flaws of the previous generations’ anti-allergy medications such as sleepiness and other adverse reactions.

Chemical and physical data
Formula C32H39NO4
Molar mass 501.68 g/mol
Chirality Racemic mixture

The development of the medication was finished in 1993 when the scientists achieved that the formulation would have the positive effects of terfenadine without the toxic effects on the heart typical for it. The company who filled the patent is Sepracor. However, soon the exclusive rights to produce and market the formulation were sold to Hoechst Marion Roussel Company which eventually through mergers and acquisitions performed by Sanofi-Aventis became the part of the globally operating pharmaceutical concern.

Currently, Fexofenadine is manufactured by other companies too because the exclusive patent expired. The formulation is one of the worldwide bestselling antihistamine medications that became over-the-counter preparation in the U.S. in 2011 where it has the highest volume of sales.

You can buy Allegra or its analogs to cope with the symptoms of seasonal allergic rhinitis (runny or stuffy nose), chronic idiopathic urticaria, allergic conjunctivitis, and so on.

Clinical data
Trade names originally Allegra, others
License data US FDA: Fexofenadine
Pregnancy category US: C (Risk not ruled out)
Routes of administration oral (pills)

The compound of the Allegra pills

The acting ingredient of the pills is Fexofenadine that is contained in the amount of 120 mg or 180 mg depending on the formulation you purchase. Besides, a tablet contains cellulose microcrystalline, corn starch, lactose, sodium croscarmellose, povidone, silicon dioxide colloid, magnesium stearate, talc, hypromellose, propylene glycol, titanium dioxide (E 171), and yellow sunset FCF (E 110) coloring for 180 mg pills.

Make sure to check the composition before you buy Fexofenadine pills to be sure that they do not contain any substances to which you are intolerant.

Pharmacokinetic data
Bioavailability 30-41%
Protein binding 60-70%
Metabolism Liver (<=5% of dose)
Elimination half-life 14.4 hours
Excretion Feces (~80%) and urine (~10%) as unchanged drug

Can you completely get rid of allergy using Allegra?

Sadly, today there are no formulations that can help you get rid of allergy or inadequate immune system response to allergens completely but there are prophylaxis means that can help you minimize the manifestations of allergy and therefore the intake of anti-allergy medications. For instance, if you have an allergy for pollen, during the blossoming season you should stay outside as little as possible and keep your windows and doors closed at all times. Besides, you can install air filters to cleanse the air that comes into your home or office. For respiratory allergy also a good cure is rinsing of nostrils with salty water which eliminates the residues of allergens. And of course, to not let the allergy worsen, you should buy Generic Allegra and start taking it at the first signs or even before the blossoming season if you suffer from seasonal rhinitis or before you get in contact with another allergen such as cats, and so on.

How are Allegra and Generic Allegra used?

There are two recommended types of therapy with the formulation that depend on the condition treated:
- Seasonal allergic rhinitis is treated with 120 mg once a day before a meal for adults and children aged more than twelve years.
- Chronic urticaria is treated with 180 mg taken once a day before a meal for adults and children aged more than twelve years.

Legal status
Legal status AU: Unscheduled
UK: POM (Prescription only)

Precautions that you need to follow when using Allegra

The formulation should be carefully used by people of old age and in the presence of the diseases of liver or kidneys.

People with cardiovascular conditions should know that all medications from the group of antihistamines can possibly cause the occurrence of such symptoms as rapid or irregular heart rate.

The pills contain lactose so people with rare hereditary forms of intolerance to galactose, insufficiency of lactase or glucose-galactose malabsorption syndrome should not order Allegra and start taking the pills but should look for lactose-free alternatives.

There is no sufficient data on the tablets use in pregnant women and children aged fewer than twelve years, therefore it is not advised to use them in these groups of people.

For whom Fexofenadine use is contraindicated?

Besides the precautions, there are strict contraindications for the preparation use such as during lactation (the drug penetrates into the milk and can harm the baby), intolerance of the formulation’s components, age younger than twelve years, renal or hepatic insufficiency.

Does the formulation interact with other medicines?

The formulation isn’t metabolized in the liver and therefore doesn’t interact with other medicines through influencing their liver metabolism.

The therapy with Fexofenadine along with erythromycin or ketoconazole provokes the elevation of its concentration two-three fold. However, this increased concentration doesn’t influence the incidence of negative effects.

The pre-clinical trials had shown that the above-mentioned changes in the drug level are related to the improved absorption and lowering of the biliary and gastrointestinal excretion.

The medication effect or concentration isn’t influenced by Omeprazole or other proton pump inhibitors but the use of antacids containing hydroxides of aluminum or magnesium 15 minutes before taking the drug, reduces its effectiveness because of its binding in the gastrointestinal tract. Therefore, if you use such medications, you need to observe a two-hour interval between their use and the use of Allegra or other drugs with Fexofenadine as a main ingredient.

What can Fexofenadine cause as side effects?

The use of the tabs can cause such negative reactions as nausea, indigestion, constipation, sleepiness, dizziness, headache, and so on.

Where can you buy Allegra?

In some countries, the branded drug is available at the regular drugstores. In others, you need to ask for a generic version or say that you want to buy Fexofenadine. We offer you to purchase either a branded or generic medication both without Rx and at low price.

World Wide Shipping

We will ship your Allegra pills to any country and city where the postal service of your choice ships.

Free prescription
Our doctor prescribes online for free, and there is no doctor’s consultation fee.

Discrete packaging
All orders arrive in discrete unmarked parcels. We leave the shipment description blank.

For more answers see the FAQ section


Product Reviews:

Dec / 12 / 2016 Emily Blacksmith   USA, Kincaid
  This autumn season Allegra supplied by 4rxstore was a real rescue for me. Thanks the company. The medication relieved my allergy attack very good.
Nov / 23 / 2016 Tim Johns   USA, Roswell
  Allegra that was delivered to me last week by 4rxstore is effective for my allergy on pets. I recommend this medication.

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04 Aug 2019
What is generic Allegra and who needs this drug?
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