Pharmacology involves examining the interactions of chemical substances with living systems, with a view to understanding the properties of drugs and their actions, including the interactions between drug molecules and drug receptors and how these interactions elicit an effect. Toxicology is the study of the adverse effects of chemicals (including drugs) on living systems and the means to prevent or ameliorate such effects. The Department of pharmacology and toxicology currently in Faculty of Pharmacy was established in 1973. More than 50 years later, the Department now includes close to 15 regular faculty members that contribute to the teaching of pharmacology and that perform research in the various sub-disciplines of pharmacology including cardiovascular pharmacology, neuropharmacology, immunopharmacology and inflammation, clinical pharmacology, Endocrine and reproductive pharmacology and ethnopharmacology. The head of the department is presently Dr. (Mrs.) O.J. Owolabi.
The department is home to a vigorous graduate program in pharmacology including a M.Sc. (masters in pharmacology) and a Ph.D. (doctorate in pharmacology) program. Specializations in neuropharmacology, clinical pharmacology, integrative cardiovascular pharmacology and molecular pharmacology can be selected at admission.