A member asked:

How long does allegra (fexofenadine) d stay in your bloodstream?

A doctor has provided 1 answer
Dr. Michael P Vaughn answered

Specializes in Allergy and Immunology

Decongestants: In the combination drugs like claritin-d, Allegra-D or zyrtec-d the decongestant medication is formulated for slow release over a period of 12 (claritin-d12) or 24 hours (claritin-d24).

Answered 6/24/2014

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A member asked:

Does allegra (fexofenadine) d have the same ingredients as nyquil?

A doctor has provided 1 answer