Abstract: A method and apparatus for counteracting adverse drug events (ADE's) which are caused by the administration of intravenous medications of incorrect types, concentrations or dosages, and which may result in morbidity and even mortality to recipient patients. A container, preferably in the nature of a transparent plastic bag employed for intravenous administrations, contains the requisite infusion at a prescribed volume, adding a specified amount of prescribed medication possessing a predefined amount of a coloring material, such as a vegetable dye, to the volume of infusion material or liquid in order to form a prescribed concentration of medication, with the coloring material defining a specific type of medication. Analyzing of the concentration of medication is effected through the utilization of spectrophotometric equipment, and to resultingly obtain a real medication concentration value.