I'm writing this as a blog entry because I don't know the answer.
I have some prescriptions that have expired, and some I could not take because of side effects. These are just sitting around in my medicine cabinet because I recall hearing that old meds. should not be put down the drain.
I called CVS in Park Forest yesterday and was advised that I should not put them down the drain. Rather, I should fill the pill bottles with water, let the medications dissolve, and then throw them in the garbage . . .