Science Struck
Science Struck: Examples of Chemistry in Everyday Life
Gives examples of chemical interactions occurring in the human body, in the world around us, in foods, and in products we use.
CK-12 Foundation
Ck 12: Biology: Drugs and the Nervous System
[Free Registration/Login may be required to access all resource tools.] Describes how drugs affect the nervous system.
Other
University of Wisconsin: Hplc
Background on HPLC, and its uses to determine the amount of caffeine in soft drinks.