Chemistry and pharmacology of nicotine.
National Institute on Drug Abuse site for tobacco addiction.
U.S. Department of Health & Human Services website on the effects of smoking on health.
Slideshow on the history of tobacco.
Presentation on smoking and cancer, with audio and animations.
Video about nicotine in the brain.
Chemistry and pharmacology of caffeine.
Basic information on caffeine.
Caffeine content of food and drugs.