Mestinon is very adversely effected by sunlight (pretty much light period) and moisture. The pills shoud be in an amber or opaque container in a cupboard out of the kitchen or bathroom. This is particularly important if you cut them for smaller dosages. The little devils just love to take on moisture and then crumble apart! I haven't put one of the moisture thingy's in (I don't know the fance name either!), but I think that's a great idea.

Sue