Pharmacology is the study of drugs and their interactions with living systems.(Lehne , 2007)
The meaning of Greek word , “Pharmakos” is medicine or drug and “logos” means a study.
The history of drugs , appear to predate civilization.The primitive person’s belief was that disease were caused , by evil spirits.
Since the down of civilization,herbal drugs and other naturally sourced materials have been used,for alleviation of human suffering.Drug was made with herbs or materials like charcoal and clay.
The Sumerians dwelling in the valleys of Tigiris and Euphrates,rivers 5000 years ago.Used compounded medicine made of salt,roots, seeds and bark of willow.