Illustrated Glossary of Organic Chemistry

Drug: A chemical introduced into a biological system in order to supplement, alter or inhibit some biological process. Some common drugs (therapeutic and otherwise) and shown.


Aspirin (acetylsalicyclic acid), an analgesic.


(S)-(-)-Nicotine, a central nervous system stimulant.


(S)-(+)-Methamphetamine, a central nervous system stimulant.