Medication
Into the bone (intraosseous (IO)).  A needle is placed into a large bone, like the femur (thigh bone), and medicines are given into the bone marrow.  Any medicine that can be given into a vein can also be given into a bone.  Like with IV medicines, all of the medicine gets into the bloodstream, immediately.  IO medicines can only be given by certain medical professionals, like doctors and paramedics.