<<Disclaimer: Verify this information before applying it to your situation.>> I just talked with a pharmacist at the company that manufacturers Ambien. As of May 1 the formula has been changed and the company can no longer guarantee that the product is gf. However, they are working to change formula back to original which contained potato starch. He told me to call back after September 1. In the meantime, can anyone recommend a sleeping pill as effective as Ambien? Thanks.