<<Disclaimer: Verify this information before applying it to your situation.>>

FYI -
I just got off the phone with Perrigo Pharmaceuticals they manufacturer
store-brand over-the-counter medications.  I confirmed with them that
the "Suphedrine" (their version of Sudafed) is gluten-free.  The one I
had they manufactured for Phar-Mor, a discount pharmacy chain out of
Ohio.  I got the medication at one in Florida.

I've heard Claritin D is not gf, but regular Claritin is.  So I'm going
back to taking the antihistamine/decongestant separately to control my
allergies.

I hope this helps.