<<Disclaimer: Verify this information before applying it to your situation.>> Hi everyone, I spoke with Schering yesterday at 1-800-222-7579 and they advise that their Claritin tablets by prescription can no longer be guaranteed to be GF. They do not test for gluten and also said that their inert ingredients change from time to time, so that is why they cannot guarantee the GF status. I am now looking for a GF substitute. I have our pharmacy checking on Allegra and Zyrtec. I hope this info helps. Barbara in Illinois