This is what I keep on hand:
- children's liquid ibuprofen (which can be given for pain and inflammation)
- a few small, needleless syringes (to administer oral fluids for a rat who can't drink/eat, or to flush an abscess with water)
- flour (to use as a blood clotting agent in event of a ripped toenail, etc.)
- some Q-tips (to help clean wounds or to pry a mouth open if you need to look inside)
- baby cereal and ensure (to make mushy food for rats who can't eat/are sick)
- pedialyte (for a dehydrated rat/a rat with diarrhea)
- band-aids and gauze (in the rare chance you get a good bite from a rat)
The only things I'd add to that for an evacuation kit is maybe a ziploc bag full of lab blocks, an extra water bottle, and a small cage that you can use to house them for an indefinite period of time.
If i think of anything else that's in my first aid kid I'll let you know! You probably won't need the band-aids for yourself, as you won't have many rats coming and going. I keep them because I run a rescue and get rats with unknown backgrounds and possible aggressive tendencies. Heh. But I guess they don't hurt to have.