Why does the ongoing itchy skin rash (eczema) on my upper lip return as soon as I stop taking Allegra (fexofenadine), and is it safe to use this medication long-term to manage it?
Allegra (fexofenadine) works by blocking histamines, which temporarily relieves your itchy eczema, but it does not cure the underlying cause. When you stop taking it, the symptoms return because the trigger is likely still present. Fexofenadine is generally safe for long-term daily use under a doctor's guidance. However, since the rash is on your upper lip, it could be a contact allergy to something like toothpaste, lip balm, or food. I highly recommend speaking with your doctor or a dermatologist to help identify the trigger and discuss targeted topical treatments for lasting relief.
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Why does the ongoing itchy skin rash (eczema) on my upper lip return as soon as I stop taking Allegra (fexofenadine), and is it safe to use this medication long-term to manage it?