I'm cheating - copying and pasting this from the lurcher forum where we often talk about first aid - as lurchers are very accident prone !
My car first aid kit is fairly small - I have homeopathic Aconite tablets, for shock, homeopathic Arnica tablets, for bruising - Rescue Remedy for shock again, or Emergency Essence (I find this more effective than RR), gauze, vetwrap, tweezers, scissors blunt ended, saline in a small can to wash wounds out (they sell it for contact lens wearers), antiseptic wipes.... there is a fantastic spray you can buy in Boots and most chemists called "First Aid Spray" its made from Calendula and Hypericum mother tinctures - basically brilliant for spraying on *clean* wounds - calendula heals cuts and hypericum helps with the pain.
My home first aid kit is massive

- I have about a hundred different homeopathic remedies - colloidal silver, Hibiscrub, Slippery Elm powder for upset tummies, also Diaransyl, Fuciderm, Neem, Tea tree, - I can't even begin to list the whole lot I'd be here all night - put it this way it takes up three shelves and two small boxes.