Question

The time taken for 5 percent of a drug to decompose by first-order kinetics is:

• A. Half-life
• B. Mean residence time
• C. Shelf-life
• D. None of the above

Hint:

Shelf-life refers to the time it takes for a drug to degrade by a certain amount, like 5%.

Answer 1

The Correct Option is C

In first-order kinetics, the decomposition of a drug follows an exponential decay. The time it takes for 50 percent of the drug to decompose is called the half-life. However, the time it takes for 5 percent of a drug to decompose is typically referred to as its "shelf-life," as it is the time after which the drug may no longer be effective. Thus, the correct answer is (c) Shelf-life.