How do we use/abuse medical and recreational drugs?

People cannot make sensible decisions about drugs unless they know their full effects.

• Scientists are developing new drugs. These need to be thoroughly tested.
• When new medical drugs are devised, they have to be extensively tested and trialled before being used. Drugs are tested in the laboratory to find if they are toxic. They are then trialled on human volunteers to discover any side effects.
• Thalidomide is a drug that was developed as a sleeping pill. It was also found to be effective in relieving morning sickness in pregnant women. However, it had not been tested for this use. Unfortunately, many babies born to mothers who took the drug were born with severe limb abnormalities. The drug was then banned, but more recently is being used successfully to treat leprosy.