Greenback Drug Co Address: 6729 Morganton Rd, Greenback, TN 37742 Phone: (865) 856-2614 Hours: Mon: 6:30am-4:30pm Tue: 6:30am-4:30pm Wed: 6:30am-4:30pm Thu: 6:30am-8pm Fri: 6:30am-4:30pm Sat: 7am-2pm Restaurants, Foods-Carry Out, American