<<Disclaimer: Verify this information before applying it to your situation.>>
The best children's decongestant I have found is Naldecon DX, made by
Bristol Myers Squibb. I posted a question on their website about the GF
status of this product, and just received a phone call from their
pharmaceutical division advising me that Naldecon DX Pediatric drops may
contain gluten, but Naldecon DX children's syrup is GF. She told me
information about the GF status of their other over the counter drugs
could be obtained at 1-800-468-7746.