Guys,
If you are planning to store any pills for a period of time, put them in an airtight jar/plastic bag with a small sachet of silica gel (dehumidifying desiccant) which will absorb all moisture in the air, keeping the pills in tip top shape. You can find silica sachets in a lot of household products,ie: bottles of viatamins, new pair of shoes, new camera ect...
You should dry it out first by placing in a medium heat oven, for a period of around 1-2 hours.
Definately worth the fiddling around. You would be suprised how much moisture a pill can absorb from just lying around, or in a warm pocket.
I work with desiccants, they're handy little buggers.
PeaKiN.