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GCSE Combined Science · key term
A substance used as a medicine to treat disease or relieve symptoms.
Used by AQA
Specification 4.3.1.9 · Paper 1
Revise: Discovery and development of drugsA drug is a substance used as a medicine to treat disease or relieve symptoms. Discovering a chemical that might be useful is only the beginning: scientists must then investigate whether it can become a safe and effective treatment.
In a double-blind trial, neither the patients nor the staff conducting the trial know who receives the drug or placebo.
Describe testing as checking safety and effectiveness, not proving that a drug can never cause harm.
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