For a very neat little pocket reference with a calculator included as well as info on burns, drip rates, arrhythmias, pacers, vcents and such, got to:
WWW.NNCCUSA.COM. I have the Critical Care Checkmate, there is also one for the Emergency Room as well. Depending on whom you talk to, some say that the ED Checkmate is better than the Critcal Care checkmate.
Always remember though, epi,neo and norepi are very necrotic if they extravisate. They should always be run through a large bore needle into a large vein.
My reference shows a concentration of 4mcg/ml (1mg to 250ml of D5W).