Allegra Precautions and Warnings

Before taking Allegra, you should be familiar with its warnings and precautions, especially if you are taking other medications or are pregnant (or may become pregnant). Nursing mothers should talk to their healthcare providers about additional precautions before taking Allegra, and people who are allergic to any of the ingredients in Allegra or fexofenadine should not take this drug at all.

What Should I Tell My Healthcare Provider Before Taking Allegra?

Prior to taking Allegra® (fexofenadine hydrochloride), it's important to tell your healthcare provider if you:
 
  • Have kidney disease
  • Are breastfeeding, pregnant, or may become pregnant
  • Are age 65 years or older
  • Have known 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 difficulty breathing or swallowing.
 

Some Allegra Precautions and Warnings

Some precautions and warnings regarding Allegra include:
 
  • Certain medications can interact with Allegra (see Allegra Drug Interactions).
     
  • Although Allegra causes drowsiness less often than other antihistamines, it can make some people tired. Therefore, until you know whether Allegra makes you tired, do not drive a car or operate potentially dangerous machinery.
     
  • Allegra is a pregnancy Category C medicine, meaning that it could potentially harm your unborn child. If you are pregnant, you should take Allegra only if the benefit outweighs the possible risk to your unborn child. Discuss this with your healthcare provider before using Allegra.
     
  • If you are nursing or plan to nurse, Allegra may pass through your milk. Therefore, if you are taking Allegra, it is recommended that you stop taking Allegra until you can discuss this with your doctor.
     
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