What are the four phases of pharmacokinetics that a drug goes through?
1. Absorption, distribution, ionization, and metabolism
2. Diffusion, bioavailability, metabolism, and excretion
3. Absorption, distribution, metabolism, and excretion
4. Active transport, ionization, diffusion, and excretion
Correct Answer: 3
Rationale 1: Ionization is the chemical property of a drug, not a phase of pharmacokinetics.
Rationale 2: Bioavailability refers to the amount of active drug available to body tissues.
Rationale 3: A drug undergoes the pharmacokinetics of absorption, diffusion, metabolism, and excretion.
Rationale 4: Ionization is the chemical property of a drug where it takes on positive or negative charges.
Global Rationale: A drug undergoes the pharmacokinetics of absorption, diffusion, metabolism, and excretion. Ionization is the chemical property of a drug, not a phase of pharmacokinetics. Bioavailability refers to the amount of active drug available to body tissues. Ionization is the chemical property of a drug where it takes on positive or negative charges.
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