Charleston Police Department, along with the Drug Enforcement Administration, will participate in the National Take Back Day on Saturday. This is a chance for the public to turn in unused or expired prescription medication. You can turn in items between 10 a.m. and 2 p.m. Saturday at the following locations: n Walgreens, 655 Washington St W.n Drug Emporium, 1603 Kanawha Blvd.