I have been taking Reglan for over a year for gastrointestinal motility, to keep foods from sticking in my chest. It also helps immeasurably with the back pain - sever - that I used to have in conjunction with the motility problem. After my doctor mentioned that it had some [unspecified] side effects, I cut down dosage no one per day in the AM. Over past several months I have noticed a grinding of my teeth, almost constantly. Could this be the beginning of Tardive Dyskinesia? Thanks to anyone who might have info. I don't know of anything that might substitue for Reglan.