I recently moved; when unpacking one of the stray boxes the other day, I found an unopened 56 count bottle of imodium from Costco that I forgot I had, I guess because I really don't use imodium that often anymore. Unfortunately, it expired December 2011. I'm sure it's still good but in general, how long is imodium still potent past its shelf expiry? It will probably take me a while to go through 56. *LOL*