Drug Absorption · Pharmacology

A drug with a high 'Bioavailability' (F value) of 0.9 suggests that:

  1. 90% of the administered dose reaches the systemic circulation intact
  2. The drug is highly toxic to the liver
  3. The drug must be administered intravenously only
  4. Only 10% of the administered dose is absorbed across the GI tract wall
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Correct answer: 90% of the administered dose reaches the systemic circulation intact

Bioavailability is the fraction of an administered dose that reaches the systemic circulation in an unchanged form. A value of 0.9 (or 90%) indicates very efficient absorption and minimal first-pass loss.

Difficulty: Medium Question 5 of 20

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