<<Disclaimer: Verify this information before applying it to your situation.>> my earlier question was if sinuvent was GF or not. I read on the label that the sinuvent is also called Guaifensin w/phenylpropanolamine. I looked up Guaifensin in my book and says it is gluten free but I also remember getting a prescription for Humabid that was also called Guaifensin on the label. So I am wondering if they are all gluten-free, even though they have different names and are made by different companies. I am not taking one until tomorrow so any details would be appreciated. thanks -Aimee