AllegraD / warfarin : I can find no warnings in the epocrates database for either fexfenadine or pseudoephedrine, the two ingredients in Allegra (fexofenadine) d regarding interactions with warfarin (coumadin) . But just to be sure, check with your pharmacist and your cardiologist. If you are taking Coumadin for a heart condition, your doctor might prefer you take plain allegra (fexofenadine). The d part, sudafed, is a cardiac stimulant.
Answered 1/20/2017
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