An infusion pump having a plurality of function keys which initiate different processes depending on the state of the infusion pump is disclosed. In the configuration state, the function keys operate to set the various configurable options with regard to the desired medication treatment parameters. In the infusing state, the function keys operate to transmit various operational data to a readout screen depending on the function key pressed. Essentially, multi-function, state dependent function keys operable on an infusion pump is disclosed.