<<Disclaimer: Verify this information before applying it to your situation.>> Just wanted to let all of you know that the manufacturer can't confirm Claritin D 24 hour as gluten free, but Zyrtec D (similar product) CAN be confirmed gf. I'm very sorry if my previous summary led any of you astray. Here is the email I received which details this: I am responding to your Claritin-D question. I was told that the company cannot say it is Def. GF.; therefore, I recently switched to Zrytec -D because the company did say it was GF. I have been diagnosed celiac for 2 and 1/2 months now and I am still researching, cutting out and changing things in my life that are GF. Ii sure takes time. Good Luck.