If you trying to avoid gluten from all the sources, you MUST know that accidental gluten intake can happen when you are taking certain over-the-counter and prescription medications. Current law does not require labeling of gluten-containing ingredients in drugs. These hidden sources of gluten can be found as part of the inactive ingredients (fillers or binders) in the tablet or capsule. When you read the list of ingredients on the package insert, look out for the following words: sodium starch glycolate, dextrate, dextrin, pregelatinized starch, maltodextrin, dextri-maltose. For more information check out this website GlutenFreeDrugs.com.