<<Disclaimer: Verify this information before applying it to your situation.>> Hi all: Thank you so much for your help! YES, Robitussin is gluten-free. Their phone number is 1-888-797-5638. Their website is www.robitussin.com. Once again, thank you for all your help. My daughter is finally sleeping soundly and I have not heard a cough in quite a while!!! Melissa in CT