Drug trials

• Stage 1 : pre-clinical testing


  scientists in this stage

  • Test on human cells and tissues grown in the laboratory
  • or other live animals
• If a drug damages cells at the pre-clinical stage

  It will likely fail to go on the next stage
• stage 2 : clinical testing 


  in clinical testing

  • tested on healthy volunteers + patients
  • checked if there safe
  • low dosage of drug
• stage 3 : clinical trial


  Now tested on human volunteers in a clinical trial:

  • Tested on healthy volunteer on a very low dosage however gradually inc
  • If results good then tested on people acc suffering w the illness finding the optimum dosage
  • double blind to see how well drug works
  • Results arnt published until peer review to prevent false claims