I need to install a lockbox in a refrigerator to keep a medicine locked up. What is the best way to do that?
I had the same problem with my mother who was unable to remember how often she was taking pain medications.  The solution was a locking &quot;cash box&quot; from a local office supply store.
The medications were in the box, which fit nicely into the refrigerator and was easily removed.  I kept one key and the other key was in a &quot;realtor&quot; style lock box on the front door that the visiting nurse had the combination to.  So the nurse gave her the meds in the morning and I gave them to her in the evening.
Obviously this is not highly secure but for an elderly person it was secure enough.