Allegra-D is a tradename that contains several active ingredients in its composition: Fexofenadine Hydrochloride (Very Low Risk) Phenylephrine (Low Risk probable) Since each active ingredient of this product may have a different level of risk for breastfeeding, we establish that of the product with higher risk. For more information (pharmacokinetics, references, ...) tap each active ingredient. Note: The composition of certain tradenames varies in each country. Please, make sure this is the composition of the tradename you are looking for..