I have always slept on my right side and the other night I read on the internet that acid reflux sufferers should sleep on their left side. I was looking for relief as I hadn't slept through the night in a long time so I gave it a try. It helped!. I've slept on my left side for two nights now and actually slept through the entire night both times. Second day, I also had less trouble during the day with the acid reflux.