Biology · Pharmacology
What does the term 'bioavailability' mean in pharmacology?
- 1Plasma protein binding degree of a substance
- 2Permeability through the blood-brain barrier
- 3The fraction of an administered drug that reaches the systemic circulation in an unchanged form✓
- 4The amount of a substance excreted in urine relative to the initial dose
Correct answer
The fraction of an administered drug that reaches the systemic circulation in an unchanged form
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