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A 32-year-old member asked:

how fast does allegra (fexofenadine) work?

2 doctor answers5 doctors weighed in
Dr. Brant Ward
Allergy and Immunology 13 years experience
20-30 minutes: Oral antihistamines like Allegra (fexofenadine) need to be absorbed by the digestive system and distributed thru the body before they are effective--about 20-30 minutes. This lag time is usually acceptable for minor allergy symptoms. But if you have asthma, swelling in the throat, or anaphylaxis, taking a quick-acting rescue med like Epinephrine or albuterol can be life-saving. Ask your doctor for more info.
Dr. John Chiu
Dr. John Chiu commented
Allergy and Immunology 57 years experience
More likely an hour.
Sep 10, 2013
Dr. Heidi Fowler
Psychiatry 25 years experience
Allegra: Allegra usually starts working within an hour.

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A 41-year-old member asked:

What is the generic form of allegra (fexofenadine)?

3 doctor answers4 doctors weighed in
Dr. Stephen Kimura
Allergy and Immunology 35 years experience
Fexofenadine: Fexofenadine.
A 40-year-old member asked:

What should I do if I accidentally take too much allegra (fexofenadine)?

2 doctor answers2 doctors weighed in
Dr. Stephen Kimura
Allergy and Immunology 35 years experience
Stop taking it.: The half life of Allegra (fexofenadine) is 14.5 hours in normal individuals. It is metabolized mainly through the liver and GI tract so if you have liver disease it may be metabolized slower. This means that in a normal individual about half of the medication is left after 14.5 hours.
A 41-year-old member asked:

How can I find allegra (fexofenadine) within a mix of my pills?

2 doctor answers2 doctors weighed in
Dr. Steven Machtinger
Allergy and Immunology 44 years experience
Pink losenge: The over-the-counter Allegra (fexofenadine) 180 mg tablet is pink and rectangular with rounded ends. There is the underlined number "018" on one side and a lower-case cursive "e" on the other.
A 33-year-old member asked:

Why would allegra (fexofenadine) be prescribed?

3 doctor answers11 doctors weighed in
Dr. Alex Martinez
Specializes in Allergy
For allergies: Allegra (fexofenadine) is an antihistamine approved in the treatment of seasonal allergies as well as hives. It is now available over-the-counter without a prescription.
A 44-year-old member asked:

What over-the-counter medicine is closest to allegra (fexofenadine) d?

2 doctor answers3 doctors weighed in
Dr. Giana Nicoara
Allergy and Immunology 28 years experience
Allegra (fexofenadine) D: All Allegra (fexofenadine) products can be found over the counter now.

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Last updated Nov 14, 2020

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