Volatile essential oils (EOs) from medicinal plants play an important role in the treatment of various diseases. EOs have been shown to exhibit anti-bacterial, antiviral, antimycotic, antitoxigenic, antiparasitic, and insecticidal properties . Several commercial phytomedicines such as Olbas oil (www.olbas.co.uk) , Tiger balm (www.tigerbalm.com) and Mentholtum contain EOs from medicinal plants such as peppermint. Thermal desorption (TD) gas chromatography mass spectroscopy (GC-MS) is a very useful technique for the analysis of volatile compounds without using tedious pre-treatment with organic solvents. Here we have analysed and compared the composition of volatile compounds of Olbas oil, Tiger Balm, and Mentholtum using TD GC-MS. Volatiles from each product have been identified and quantified. Menthol and eucalyptol have been found to be present in all the products (Figure). The easy and sensitive TD GC-MS method is useful for the quality control of phytomedicines containing volatile compounds. (Figure Presented).