Question

In plasma drug concentration versus time graph as shown in the picture, what should be the correct option for the marked place?

(a) Elimination phase

(b) Post absorption phase

(c) Absorption phase

(d) Duration of action

I had been asked this question during a job interview.

Question is taken from Pharmacokinetic topic in chapter Pharmacokinetic Drug Interactions & Basic Considerations of Drug Biotechnology

Answer 1

Correct option is (b) Post absorption phase

Easiest explanation: Post absorption phase is the phase when the distribution of the drugs happens. This phase comes before the elimination phase. Post absorption phase comes after the absorption phase that is when all the drug molecules are absorbed into the plasma.