Huh, I didn't know that about Ambien (off to read more now!) but I know I've got to sleep on a slanted wedge pillow, minimum, and take Prilosec daily too, because of reflux. For the first several follow-up appointments, we were seeing damage due to reflux (even though it was hard to notice otherwise), so we put me on it long-term (ENT's decision, scoped me each time). Every now and then I run out, and stop taking it for a time, and then learn I still need it. Not sure if aspirating is the right term, but reflux fits, and the meds do help (though they also impact other vitamin absorption, and my family doctor helps me stay on top of that). Something to consider, if the tests aren't showing aspiration ... are they showing any damage or signs of reflux?