Ricola Cough Drops are not gluten free. They say this on the website
Are your products gluten-free?
In the United States, there are no established government standards as to what can be considered gluten-free or what is safe for use in celiac patients. Our products contain less than 0.01% gluten. We urge you to share this information with your doctor or to contact the Celiac Sprue Association of the USA @1-877-CSA-4CSA.