The science of man is
also changing and human physiology has changed a lot since the time, the branch
of pharmacology began. Science in general changed completely as far back as
1925 with Werner Heisenberg’s uncertainty principle. Drug administration is the
major responsibility of the nurses. To handle the drugs, nurses should have the
basic knowledge of action, adverse effects, indication and contraindication of
commonly used drugs and nursing responsibilities while administering the drug.
Pharmacology is the study of the interaction
of chemicals with living systems. The term pharmacology is obtained from the
Greek word “pharmakon” which means as drug and “logos” means the study of
Drugs are chemicals that act
on living systems at the chemical (molecular) level. The term drug is
derived from the French word “drogue” which means “dry herb”.
Medical pharmacology is the study of drugs
used for the diagnosis, prevention, and treatment of disease.
Toxicology is the study of the
untoward effects of chemical agents on living systems. It is usually
considered an area of pharmacology.
Pharmacodynamic properties of a drug describe
the action of the drug on the body, including receptor interactions,
dose-response phenomena, and mechanisms of therapeutic and toxic action.
Pharmacokinetic properties describe the
action of the body on the drug, including absorption, distribution, metabolism,
and excretion. Elimination of a drug may be achieved by metabolism or by