Vernonia cinerea Less. (VC) is classified in the Asteraceae Family as a slender stemmed plant, variable in leaf shape with pinkish-purple flowers. It has been documented and recommended in Thai traditional medicine, as in other countries, for smoking cessation, and relief of asthma, cough, fever, malaria, urinary calculi, and arthritis. Unfortunately, little scientific data are available in regards to these effects. VC is a perennial herbaceous plant and distributed in grassy areas found in Southeast Asia and Hawaii [25-27]. In a mouse model, study of the active compound in VC had noted anti-inflammatory, analgesic, and antipyretic activities [28]. In addition, a methanol extract of VC has been shown to exhibit significant anti-inflammatory activity in a rat model [29]. The active compound is proposed as a flavonoid and terpenoid [30], exhibiting both anti-oxidant and anti-inflammatory activities.