These are dependent on what you already have in the pantry, but:

A Tbsp of carob powder (usually taken in a little applesauce, but you could mix it with whatever you have on hand) is good remedy for diarrhea. I keep some on hand just for this purpose.

For the women, a clove of garlic can be used to combat yeast infections. It's used at night (inserted) and removed in the morning.

A few grains (6-7) of cayenne pepper snorted can offer migraine relief. Not necessarily pleasant, but neither is a migraine that lasts for days!