drug development.

Question 1

why do they have to be tested?

Answer 1

to ensure safety and effectiness.

Question 2

what happens during drug trials?

Answer 2

new drugs are tested for efficiency and toxicity as well as to find the best dose.

Question 3

what is the first stage of a drug trial called?

Answer 3

preclinical trials.

Question 4

what happens during preclinical trials?

Answer 4

tested on human cells and tissues as well as on animals.

Question 5

what is the second stage of a drug trial called?

Answer 5

clinical trials.

Question 6

what happens during clinical trials?

Answer 6

tested on healthy volunteers in low doses.
then on ill volunteers to find optimum dosage.