WINONA, Minn. — A drug take-back event has been scheduled for Saturday by police agencies and the Hiawatha Valley Mental Health Center. Anonymous drop-offs are assured, sponsors said. The drop-off point: Hiawatha Valley Mental Health at 420 East Sarnia Street. Time: 10 a.m.  to 12 p.m. The goal: Environmentally safe disposal of unneeded medications and keeping them off the street to reduce misuse and abuse. Unaccepted: Syringes, sharps or illicit drugs.