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Phenylephrine vs. Pseudoephedrine: How Do They Compare for Congestion?
Another difference between phenylephrine and pseudoephedrine ... sold as Sudafed and other products that contain pseudoephedrine (such as Zyrtec-D, Mucinex-D, and others). Restrictions include ...
Claritin-D, Allegra-D, and Zyrtec-D all contain a decongestant called pseudoephedrine ... That said, they do have some very slight differences - which probably aren't noticeable to every user.
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