Any compound, mixture, or preparation containing limited quantities of any of the following narcotic drugs is included in Schedule IV which shall include one or more non-narcotic active medicinal ingredients in sufficient proportion to confer upon the compound, mixture, or preparation, valuable medicinal qualities other than those possessed by the narcotic drug alone:
(1) Not more than 200 milligrams of codeine per 100 milliliters or per 100 grams;
(2) Not more than 100 milligrams of dihydrocodeine per 100 milliliters or per 100 grams;
(3) Not more than 50 milligrams of ethylmorphine per 100 milliliters or per 100 grams;
(4) Not more than 2.5 milligrams of diphenoxylate and not less than 25 micrograms of atropine sulfate per dosage unit;
(5) Not more than 100 milligrams of opium per 100 milliliters or per 100 grams, or not more than 5 milligrams per dosage unit; and
(6) Not more than 1 milligram of difenoxin and not less than twenty-five micrograms of atropine sulfate per dosage unit.