The Danbury Police Department will be taking part in the DEA's National prescription drug take back day on Saturday.  Police say this is the time to clean out medicine cabinets and drop off  unused medicines in the front lobby of the Danbury Police Department.  The official collection is between 10am - 2pm, but the Danbury Police Department does have a box in their lobby for round the clock collection.  Police say unused medicines in the home are a leading cause of accidental poisoning.  Flushed or trashed medicines can end up polluting the waters.