Pharmacokinetics: practice question

A Pharmacology question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Pharmacology · Pharmacokinetics

Sample item

What does steady state mean during repeated drug dosing?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

A. Rate of drug input equals rate of elimination

At steady state, average drug input over a dosing interval equals elimination, so average plasma concentration becomes stable around a predictable level.

Option by option

  • A. Rate of drug input equals rate of elimination (correct)

    Correct: input and output balance at steady state.

  • B. All drug is protein bound

    Protein binding can vary independently.

  • C. Drug concentration is zero

    Concentration is usually not zero.

  • D. Absorption is complete

    Absorption need not be complete.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

More Pharmacology questions

Questions about this Pharmacology question

What is the answer to this Pharmacology question?

The best answer is A, Rate of drug input equals rate of elimination. At steady state, average drug input over a dosing interval equals elimination, so average plasma concentration becomes stable around a predictable level.

Why is "All drug is protein bound" not the answer?

Protein binding can vary independently.

Why is "Drug concentration is zero" not the answer?

Concentration is usually not zero.

Why is "Absorption is complete" not the answer?

Absorption need not be complete.

What concept does this question test?

It tests Pharmacokinetics in Pharmacology. The correct option holds because: Correct: input and output balance at steady state.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Pharmacokinetics?

Learn drugs as classes, then the exception in each class that an examiner would pick. Then use the flashcards and the other Pharmacology questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.