Eric is too injured to continue without powerful anesthetics. He won't die but he won't be able to help out the party and will have to stay behind The side effects of using these powerful anesthetics could be lethal and you don't seem to have any anyways. Mike can continue, but he won't be able to use his left arm and will be heavily distracted by the pain for the rest of the day. You could, of course, pull either/both of them along, but this might hinder your ability to react to threats.