a drug: a chemical that alters how the mind and body functions
new drugs are tested for toxicity, efficacy and dosage
1) drugs are tested in lab using tissues, cells and live animals
2) tested on human volunteers in clinical trials. very low doses are given at the start.
3) if it is found to be safe, further clinical trials are carried out to determine optimum dosage
double blind tests are done to determine side effects. the doctor doesn't know about it to prevent bias.
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