Allegra

Allegra is a prescription antihistamine used primarily for the treatment of seasonal allergies. It relieves common allergy symptoms with minimal side effects. Allegra works by blocking the effects of histamine, reducing the symptoms of sneezing, runny nose, and irritation of the throat and eyes. Allegra comes in the form of tablets, orally disintegrating tablets (ODTs), and oral suspension (liquid). Common side effects of Allegra may include headache, back pain, or coughing.

 

What Is Allegra?

Allegra® (fexofenadine hydrochloride) is a prescription medication used to treat allergies and hives. It is part of a class of medicines called "antihistamines." Allegra is also available with an added decongestant, known as Allegra-D.
 

Who Makes Allegra?

Allegra is manufactured by sanofi-aventis Pharmaceuticals.
 

What Is Allegra Used For?

Allegra has been licensed for several uses in adults and children six years of age and older. These uses for Allegra include:
 
  • Relief of seasonal allergy symptoms (hay fever)
  • Treatment of chronic (long-term) hives and itching, known as "chronic urticaria."
     
(Click What Is Allegra Used For? for more information.)
 

How Does Allegra Work?

When you come in contact with something you're allergic to, a chain reaction begins inside your body. During this chain reaction, specialized cells release powerful chemicals. Some of these chemicals can trigger swelling of the nasal passages leading to nasal congestion (a "stuffy nose"). Other chemicals, such as histamine, can cause sneezing, itching, and irritation.
 
Allegra is classified as an antihistamine. Allegra blocks the effects of histamine (hence its classification as an antihistamine). This can relieve allergy symptoms. However, since histamine is not the cause of nasal congestion, Allegra will not help open nasal passages.
 
(Allegra Continued: Page 2)
Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;