This module is dealt with pharmacognosy, a study of drugs of natural origin. It is also de fined as “the study of the physical, chemical, biochemical and biological properties of drugs, drug substances or potential drugs or drug substances of natural origin as well as the search for new drugs from natural sources”. Pharmacology is the branch of medicine and biology and the study of the biological effects that the chemicals in medicinal plants have on cell cultures, animals and humans.

By studying this module, students familiarise with plant nomenclature and taxonomy; classification, identification and histological characters of plants (leaves, stem, root, bark, flower, fruit and seed); preliminary observation; organized (cellular) crude drugs; and unorganized (acellular) Crude Drugs.