Allegra-D

Generic name:fexofenadine and pseudoephedrine [ FEX-oh-FEN-a-deen-and-SOO-doe-ee-FED-rin ]
Brand names: Allegra-D 12 Hour, Allegra-D 24 Hour
Drug class:Upper respiratory combinations

Medically reviewed by Drugs.com. Last updated on Jul 30, 2021.

What is Allegra-D?

Allegra-D contains a combination of fexofenadine and pseudoephedrine. Fexofenadine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose.

Pseudoephedrine is a decongestant that shrinks blood vessels in the nasal passages. Dilated blood vessels can cause nasal congestion (stuffy nose).

Allegra-D is used to treat sneezing, runny or stuffy nose, itchy or watery eyes, hives, skin rash, itching, and other symptoms of allergies and the common cold.

Allegra-D may also be used for purposes not listed in this medication guide.

Warnings

Do not use Allegra-D if you have used an MAO inhibitor in the past 14 days, such as isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, or tranylcypromine.

Ask a doctor or pharmacist before using any other cough, cold, allergy, or sleep medicine. Antihistamines and decongestants are contained in many combination medicines. Taking certain products together can cause you to get too much of a certain drug. Check the label to see if a medicine contains an antihistamine or decongestant.

Allegra-D may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be alert. Drinking alcohol can increase certain side effects of Allegra-D.

Before taking this medicine

Do not use Allegra-D if you have used an MAO inhibitor in the past 14 days. A dangerous drug interaction could occur. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, tranylcypromine, and others.

Ask a doctor or pharmacist if it is safe for you to take Allegra-D if you have:

• kidney disease;

• glaucoma;

• heart disease or high blood pressure;

• diabetes;

• thyroid disorder; or

• bladder obstruction or other urination problems.

It is not known whether Allegra-D will harm an unborn baby. Ask a doctor before using this medicine if you are pregnant.

Pseudoephedrine can pass into breast milk and may cause side effects in the nursing baby. Ask a doctor before using Allegra-D if you are breast-feeding.

Do not give Allegra-D to a child without medical advice.

How should I take Allegra-D?

Use Allegra-D exactly as directed on the label, or as prescribed by your doctor. Use exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended. Cold or allergy medicine is usually taken only for a short time until your symptoms clear up.

Do not give this medication ...