Pete is correct; sorry I didn't make my point more clear.

When you get a cold at home, try some of the OTC meds to see which works best. Yes, find out at home if you're allergic to something that is packed in your FAK. Find out if and to what degree certain cold meds make you drowsy or keep you wide-eyed awake. For example I know through experience that I simply cannot tolerate some cold meds because they make me so sleepy as to be dangerous. Find out now, not while huddling in the shell of your downed airplane or whatever.