1.1. Importance of herbal medicine
Greater attention has been paid to the herbal medicine even in developed countries. Herbal medicine has been used and trusted globally for thousands of years for their easy accessibility and restricted side effects (Padmavathi, 2013). Traditional medicines that are utilized by 80% of the population have compounds derived from herbal plants (Arunkumar and Muthuselvam, 2009). The medicinal values of these plants are usually due to the presence of phytochemical content as stated by Essien et al. (2012) and the most important of these phytochemicals include alkaloids, tannins, flavonoids and phenolic compounds.