120 tablets of 25mg phenformin hydrochloride tablet and 4mg chlorpheniramine maleate tablet, respectively, were assayed and analyzed to obtain basic data on the content uniformity of domestic pharmaceuticals. All of the tablets of phenformin hydrochloride and that of chlorpheniramine maleate were met the requirements of the test for weight variation and content but no regularity was found in the content unformity specifications. In case of chlorpheniramine maleate tablets, standard deviation of active ingredient content of B maker was 4.1% and that of C maker 7.1%.