Sanofi-Aventis | Allegra (Medication)


Allegra/fexofenadine hydrochloride 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.

Allegra is used to treat the symptoms of seasonal allergies (hay fever) in adults and children. Allegra is also used to treat skin itching and hives caused by a condition called chronic idiopathic urticaria in adults and children.

Allegra/fexofenadine hydrochloride is a white to off-white crystalline powder. It is freely soluble in methanol and ethanol, slightly soluble in chloroform and water, and insoluble in hexane. ...

Side Effect:

Stop taking fexofenadine and call your doctor if you have fever, chills, body aches, cough, or other flu symptoms.

Less serious side effects may include:nausea, diarrhea, upset stomach; menstrual cramps; drowsiness, tired feeling;headache; or muscle or back pain. Fruit juices such as grapefruit, orange and apple may reduce the bioavailability and exposure of fexofenadine. This is based on the results from 3 clinical studies using histamine induced skin wheals and flares coupled with population pharmacokinetic analysis.

Seek immediate medical attention if you experience any symptoms of a serious allergic reaction, such as:rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. ...


Prior to using Allegra ask your doctor or pharmacist if it is safe for you to take it if you are allergic to any drugs, or if you have kidney disease.

During pregnancy and breastfeeding is not recommended to use this medicine without your doctor's advice. ...