what is a drug?
drugs are substances that change chemical reactions in the body.
Developing new drugs
new drugs are tested before release to the public to ensure they are safe and that they work.
3 stages of testing:
1) computer testing using models and human cells grown in a lab. many substances fail this test because they damage cells or just don't seem to work.
2) drugs that pass the first stage are then tested on animals- involves giving a known amount of substance…