Illegal drugs are classified on a scale from A to C. Tobacco and alcohol are legal recreational drugs. Prescription drugs are tested in clinical trials. Antibiotics can stop the growth of bacteria.
What do depressants do?
What sort of drug is caffeine?
How are drugs produced?
Why are drugs tested on animals?
What is a placebo?
In which sort of trial do the researchers know which group the volunteers are in, but the volunteers do not?
How do antibiotics work?
What is the addictive substance in tobacco smoke?
Why does smoking increase the risk of coronary heart disease?
What is a long term effect of excessive alcohol use?