Drugs Home > Side Effects of Fexofenadine

Rare Side Effects

A number of side effects occurred in less than 2 percent of people who were taking fexofenadine (or the percentage of these side effects could not be determined). It is difficult to tell whether these side effects were caused by fexofenadine or some other factor.
Some possible rare fexofenadine side effects include, but are not limited to:
  • Sleep problems, including insomnia
  • Allergic reaction
  • Unexplained rash
  • Painful menstrual periods
  • Nervousness
  • Swelling of the lips, mouth, or throat
  • Difficulty breathing.

Final Thoughts

It is possible that you may experience some side effects while taking fexofenadine. Unfortunately, there is no way for your healthcare provider to know beforehand if you will have side effects from a medicine that you have never tried.
Therefore, make sure to let your healthcare provider know if you develop any side effects. Also, let your healthcare provider know if you develop something that "just does not seem right." While it may not be one of the fexofenadine side effects, your healthcare provider will be able to diagnose and treat the problem.
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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