I Have Been Taking Chlordiazepoxide-Clidinium (1 Capsule Ea Day) For

I have been taking Chlordiazepoxide-Clidinium (1 capsule ea day) for years for IBS-D. Since going on Medicare, the insurance will no longer pay for it at all and it is too expensive for me to continue taking it; however, I need something to take in it's place. Can you give me the name or names of alternative meds that I can check into in order to find something that the RX insurance will cover?
Thank you.