IANAD but I think it means no food in your stomach when you take your meds. Since it can take a while to move food through your digestive system I would think that no food in the past 4-6 hours would constitute an empty stomach.
The population within the borough limits was 10,568 at the 2010 census. When combined with the surrounding Washington and Quincy Townships, the population of greater Waynesboro is 28,285. The Waynesboro Area School District serves a resident population of 32,386, according to 2010 federal census data.
Murfreesboro is a city in and the county seat of Rutherford County, Tennessee. The population was 108,755 according to the 2010 census, up from 68,816 residents certified during the 2000 census. 2014 census estimates show a population of 120,954.