The cheapest option for Immodium that I have found is the Ship & Save subscription for the 200 ct bottles through CVS. I'm paying on average $15/bottle, so still quadruple the price of what I paid for it from CVS, but since Wal-Mart stopped carrying the 200ct bottles, this is the most economical option I've found. It is also nice that it is shipped right to my door on a pre-set frequency to make sure I don't run out.