Smartphone-controlled smart bandage for better, faster healing. Wireless microcontrollers release precise amounts of antibiotics, painkillers, growth factors or other medications. The bandage, which remains several years from market, could improve treatment of chronic skin wounds related to diabetes. Source 1m.
Having something like this on hand could help a lot but how bulky would this phone be to have the chemicals on board to react to any medical emergency. I think as we learn more and are more medically inclined I would think that smart phones could call in a medibot to administer the drugs that are needed.