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.
Baton Rouge Population 2017. Baton Rouge is the capital of Louisiana and located in East Baton Rouge Parish along the Mississippi River. The city is a large research, medical, technology and industrial center of the South. Baton Rouge is located 157 miles north of the Gulf of Mexico and 80 miles out of New Orleans. Baton Rouge is the second-largest metropolitan city in Louisiana with a population estimated at 230,000. The Greater Baton Rouge area, however, has a population of 825,000 while the urban area has close to 600,000 people.