ABSTRACT
Neuropharmacology is the study and evaluation of the effects of drugs on the nervous system. As mentioned previously, humans have known that chemicals found in plants and animals can cause profound changes in the function of the nervous system and have used natural products such as opium, cannabis, belladonna, and alcohol for thousands of years. As people developed the capacity to extract, purify, and nally synthesize new chemical substances, the number of chemicals that can modify nervous system function has grown rapidly.
