This is why I also still carry a tiny Zip-loc, to reseal the unused part of a package.
Of course, this solution applies to medication I don't take on a regular basis (I don't take any anyways), but for pills you only take on occasion, I think it works great. And space-wise, it's soooo much more efficient than rolling up those tiny Zip-Locs!
Making a package takes 5 seconds, so... seal away! <img src="/images/graemlins/wink.gif" alt="" />
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"The only easy day was yesterday."