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Side Effects of Allegra

(The list below does not include all possible side effects of Allegra. Your healthcare provider can discuss a more complete list of Allegra side effects with you.)
 
As with any medicine, there are possible side effects with Allegra. However, not everyone who takes Allegra will experience side effects. In fact, most people tolerate Allegra well. In most cases, Allegra side effects are minor, meaning they require no treatment or are easily treated by you or your healthcare provider.
 
Based on clinical studies, the most common side effects of Allegra occurring in either adults or children are:
 

Drug Interactions With Allegra

Several medications may potentially interact with Allegra.
 
(Click Allegra Drug Interactions for more information about Allegra and these medicines.)
 

What Should I Tell My Healthcare Provider Before Taking Allegra?

You should talk with your healthcare provider prior to taking Allegra if you:
 
  • Have kidney disease
  • Are pregnant or are planning to become pregnant
  • Are breastfeeding
  • Are 65 years of age of older 
  • Have any allergies, including allergies to Allegra or fexofenadine.
     
Also, tell your healthcare provider about all the medicines you take, including prescription and non-prescription medicines, antacids, vitamins, and herbal supplements.
 
Finally, make sure to contact your healthcare provider or call an ambulance immediately if you experience any breathing problems or difficulty swallowing.
 
(Click Allegra Precautions and Warnings for more information on this topic, including information on who should not take Allegra.)
 
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
List of references (click here):
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