<<Disclaimer: Verify this information before applying it to your situation.>> I'm answering my own post from last week regarding the safety of Donnatal anti spasmodic pills- (the only thing that helps when I get cramped up and the runs) I spoke to Wyeth-Ayerst Labs (800-999-9384) and it seems that the ones I take- the regular Donnatal (White pills w/ an "R" stamped on them) are gf BUT Their Donnatal Extendtabs(Shiny Green Ones) are NOT GF-they contain wheat flour. This is just a constant reminder on how carefully we must check and prescription drug (as well as over the counter ones) especially one that is being used to fix us up when we are ill. Leslie-NYC