Many people who drink alcohol crusade against drug abuse, never acknowledging that they themselves are involved with a powerful drug. In the same way, many cigarette addicts have no idea that tobacco is a very strong drug, and few people who drink coffee realize the true nature of that beverage. The decision to call some substances drugs and others not is often arbitrary. In the first place, foods, drugs, and poisons are not clear-cut categories. Second, people have strong emotional reactions to them.
Food is good.
Poison is bad. Drugs may be good or bad, and whether they are seen as good or bad depends on who is looking at them. Many people agree that drugs are good when doctors give them to patients in order to make them better. Some religious groups, such as Christian Scientists, do not share that view, however. They believe that God intends us to deal with illness without drugs.