Three years ago, I wanted to dispose of a medication that I took only once. I went to my local Rite Aid pharmacy and asked if they could take it back for proper disposal. The answer was no. Last week, I noticed a sign for the Rite Aid Take Away Environmental Return System. For $3.99, you can buy a Sharps Compliance envelope, place your expired/unused/unwanted medications inside, then mail it for incineration.
The program is available in all stores except in the state of Maine, where another program is in place.