B6.3.13 Flashcards
What are the sources of new sources
Many com from plant extracts, and some are made in the laboratory.
When scientists find drugs what do they do
They perform laboratory tests to see how it behaves including tests on cells, bacteria and tissue cultures. this is done before testing on living organisms. Known as preclinical testing
What is the two stages of drug testing
1) The drug is tested on animals. In the UK, data is needed from two animal species before it can be used in trails involving humans
2) The drug is testes on humans this is a clinical trial
What are the three stages of a clinical trial
The drug is tested on healthy volunteers, to look for unexpected side effects
The drug is tested on a small sample of volunteers - usually a few hundred - to see how effective the drug is
The drug is tested on a large number of people - with the condition to see how well it works and to see if it’s safe for use
What is the placebo effect
Sometimes people feel better because they expect to feel better as a result of taking a medicine - this is known as the placebo effect.
What do researchers use to overcome the placebo effect.
To overcome the placebo effect in clinical trials, researchers use a double blind trial.
What is the double blind test
They give the drug to some patients, while others get an exact replica of the drug, which contains no active ingredients. This is the placebo. Neither the doctor of the patients and told who received the drug until the test is over.
