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.
The estimated population of Nashville in 2016 is 659,042. The Nashville metropolitan statistical area is estimated to have 1.75 million people, up from 1.59 million in 2010. In 2016, the population of the city proper is estimated at 659,042 -- not including semi-independent municipalities.