Plants have been well documented for their medicinal uses for thousands of years. They have evolved and adapted over millions of years to withstand bacteria, insects, fungi, and weather, to produce unique, structurally diverse, secondary metabolites. Their ethnopharmacological properties have been used as a primary source of medicines for early drug discovery (McRae et al, 2007; Fellows and Scofield, 1995). According to the World Health Organization (WHO), 80% of people still rely on plant-based traditional medicines for primary health care (Fansworth et al, 1985) and 80% of 122 plant-derived drugs were related to their original ethnopharmacological purpose (Fabricant and Farnsworth, 2001). The knowledge associated with traditional medicine (complementary or alternative herbal products) has promoted further investigations of medicinal plants as potential medicines and has led to the isolation of many natural products that have become well-known pharmaceuticals. The use of herbal medicines among Nigerians and the tendency by patients to combine this class of medicines with allopathic drugs while on hospital admission is on the increase (Fakeye and Onyemadu, 2008). The reasons for this include the affordability of these remedies as well as superstitious beliefs commonly spread by the traditional herbal medicine practitioners, and their patrons alike, contribute immensely to the increase in consumption of these herbal remedies (Calixto, 2000; Kaplowitz, 1997; Shaw et al, 1997).