Question

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

(a) Maximum safe concentration

(b) Minimum effective concentration

(c) Therapeutic range

(d) Onset of action

I have been asked this question in an international level competition.

My enquiry is from Pharmacokinetic in division Pharmacokinetic Drug Interactions & Basic Considerations of Drug Biotechnology

Answer 1

Right option is (d) Onset of action

Best explanation: Onset of action is the beginning of the pharmacological response for a drug. The pharmacological action just occurs when the plasma drug concentration exceeds the minimum effective concentration.