Could be related: Allegra (fexofenadine) d has not been usually associated with decreased appetite.The Pseudoephedrine which is the d part of the Allegra (fexofenadine) d can cause nausea in very few patients and if that is the symptom you are experiencing then you wont experience this with plain allegra (fexofenadine).
Answered 10/24/2017
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