biology unit 1- medicine and drugs

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Developing new substances

  • substances are tested to see if they cure disease or relieve symptoms
  • first tests on cells, tissues or organs in a lab
  • second test on animals
  • third test on healthy volunteers
  • fourth test on patients
  • placebos are given to check that the drug really does have an effect
  • double blind trial- neither patient or doctor know who has placebo
  • thalidomide deleveloped as a sleeping pill but pregant women took it to cure morning sickeness- wasnt tested on pregnant women so the babies were born with


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