Pharmacology is the study of drugs or chemical substances that interact with different living systems, such as single molecules, cells, tissues, and entire organisms, in order to achieve a certain effect.
Pharmacology covers all facets of pharmacological knowledge, but it focuses especially on those that are crucial to the efficient and secure application of medications for medical purposes. For a very long time, the majority of medicines were simple natural materials with unknown chemical compositions, little efficacy, and only overt effects on the body. Animals were predominantly used in the 18th century to comprehend physiological processes. F. Magendie and Claude Bernard invented these and utilized animals to explore the effects of the medications.