A patient asks why a drug given by intravenous injection often acts faster than the same drug taken by mouth. Which response is correct?
Correct answer: A. It bypasses gastrointestinal absorption
- A. It bypasses gastrointestinal absorption
- B. It is always safer than oral therapy
- C. It cannot cause adverse reactions
- D. It is completely removed by the kidneys
Explanation
An intravenous drug enters the bloodstream directly and bypasses gastrointestinal absorption, so its onset is often rapid. It can still cause serious adverse reactions and is not automatically safer than an oral medicine.
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About Principles of Pharmacology
Pharmacology examines drug sources, names, dosage forms, mechanisms of action, absorption, distribution, metabolism and excretion. Questions cover pharmacokinetics versus pharmacodynamics, therapeutic effects, adverse reactions, contraindications, drug interactions, tolerance, dependence and the safety responsibilities of the nurse.
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