By employing a derivatization scheme, phenylpropanol‐amine hydrochloride, phenylephrine hydrochloride, phenyltolox‐amine citrate, and chlorpheniramine maleate can be separated by means of a single injection in a suitable flame‐ionization gas‐liquid chromatograph. Formulated mixtures of the same components can be analyzed quantitatively in the same way. Precision at the 95 percent confidence level for the four compounds is 4.4 to 7.9 percent. Accuracy with respect to label claim is good. Copyright © 1969 Wiley‐Liss, Inc., A Wiley Company