If a drug has a half-life of, say, 16 hours, how does the concentration in the body reach zero at some point?

Question

If a drug has a half-life of, say, 16 hours, how does the concentration in the body reach zero at some point?

In: 2

Answer 1

You already know that the concentration will get down to negligible because of the half-life. Then you must allow for the body’s mechanical elimination systems like urine/feces plus the constant tearing down and rebuilding of cells.