This link describes what's all in a well rounded first aid kit.
http://fromthetrenchesworldreport.com/heres-a-look-inside-the-first-aid-kit-of-an-army-medic/235804
http://fromthetrenchesworldreport.com/heres-a-look-inside-the-first-aid-kit-of-an-army-medic/235804