pharmacology

Concise Oxford English Dictionary © 2008 Oxford University Press:
pharmacology/fɑːməˈkɒləʤi/

▶noun the branch of science concerned with the uses, effects, and action of drugs.

– derivatives
pharmacologic adjective,
pharmacological adjective,
pharmacologically adverb,
pharmacologist noun.

– origin C18: from mod. L. pharmacologia, from Gk pharmakon ‘drug’.