Participants with known insomnia will undergo an overnight pH and sleep study. Those found to be eligible after the first sleep study (those with significantly poor sleep quality and no significant sleep apnea) will be started on 2 weeks 20 mgs, twice-a-day, rabeprazole. Upon completion of the 2 week course of rabeprazole, subjects will repeat the overnight pH and sleep studies. Upon completion of these studies, participation is complete.