Y'know, I don't know that this is researched well, or if it is, it's not dissiminated well.

I would assume most tablets/capsules are fine in cold weather.

I have heard some liquid meds do poorly in heat (denaturing proteins, things like that). I would assume problems with freezing liquids would occur if you're using vials and such.

My gut instinct, with absolutely no scientific proof, is you'll be fine for a while, for most meds, for a couple days anyway. where did you hear about freezing and OTC meds?