Wanted: Old or undesired prescription and over the counter drugs. The Cass County Sheriff's Office is now providing a permanent drop box as a way to safely dispose of prescription and over the counter medications, vitamins, and other supplements. Sorry, liquids, patches, sharps or lancets cannot be accepted. The drop box is located at: Cass County Sheriff's Office, 321 M-62, Cassopolis, MI 49031. Open 24 hours a day 7 days a week.