Bioavailability · Pharmacology

Which pharmacokinetic process occurs immediately after a drug enters systemic circulation?

  1. Absorption
  2. Excretion
  3. Metabolism
  4. Distribution
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Correct answer: Distribution

Once a drug enters systemic circulation, it is distributed to tissues and organs. Absorption occurs before this step and determines initial bioavailability.

Difficulty: Medium Question 14 of 20

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