Definitions and Terminology

A Drug

drug is defined as any chemical (substance) that can affect living processes (lehne , 2007)

Pharmacology 

Pharmacology is defined as the study of drugs and their interactions with living systems.(Lehne , 2007)

Clinical Pharmacology

Clinical Pharmacology is defined as the study of drugs in humans.It gives data,about indications,the potency ,doses and toxicity of drugs,for their safe clinical use.(Lehne , 2007)

Evolution of Pharmacology

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.