to assist in organizing the pharmaceuticals one of the drawers 41 has a key lock 42 thereon this drawer 41 is used to contain controlled substances in order to open the drawer an operator must insert a key into the key lock 42 and unlock the drawer another drawer 43 is contained in an insulated portion of the case 35 so that the drawer is thermally insulated on all sides this drawer 43 is used to contain drugs that are maintained at a temperature that is different from the drugs in the other drawers for example 34 refrigerated drugs 34 can be contained in this insulated drawer 43 refrigerated drugs typically are required to be stored at colder temperatures for example 35 50 degrees fahrenheit than room temperature the drawer unit 13 fits inside of the interior case 15 the interior case 15 is dosed on all sides except for a front opening 45 referring to the orientation of fig2 the front opening 45 allows the drawers 37 to be pulled out from the drawer unit 13 the interior case 15 also has openings 47 in the top for heat exchangers the interior case 15 is surrounded on all sides with the exception of the front opening by the insulation 17 the insulation 17 is of the thermal type for example polystyrene foam the exterior case 19 surrounds the top and three sides of the insulation 17 the exterior case is made of a rigid durable material such as high impact plastic the front of the exterior case 19 has an opening 49.