Abstract: A high performance liquid chromatographic (HPLC) method was developed for the simultaneous determination of paracetamol, caffeine and chlorphenamine maleate in Pediatric Paracetamol and Amantadine Hydrochloride Granules. The separation was performed on a Diamonsil C18 column with 0.1% triethylamine aqueous solution (adjusted pH to 3.7±0.5) and acetonitrile as the mobile phase of gradient elution at a flow rate of 1.0 mL/min. The detection wavelengths were set at 280 nm and 210 nm. The linearities were wide (2.4~60, 0.14~3.6, 0.019~0.48 μg for paracetamol, caffeine and chlorphenamine maleate, respectively)and the average recoveries were not less than 99.0%. The method is simple, accurate and reproducible. It is a good method for the quality control of Pediatric Paracetamol and Amantadine Hydrochloride Granules.

Key words: caffeine, chlorphenamine maleate, dual wavelength detection, paracetamol, Pediatric Paracetamol and Amantadine Hydrochloride Granules, high performance liquid chromatography (HPLC)