Which statement best describes the action of metoprolol in a patient with hypertension and angina?
Correct answer: A. It lowers heart rate and myocardial oxygen demand
- A. It lowers heart rate and myocardial oxygen demand
- B. It increases heart rate and coronary oxygen demand
- C. It dissolves clots within the coronary arteries
- D. It directly relaxes bronchial smooth muscle
Explanation
Metoprolol is a beta1 selective blocker that lowers heart rate, contractility and blood pressure, thereby reducing myocardial oxygen demand. It does not dissolve thrombi or function as a bronchodilator, and selectivity is reduced at higher doses.
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About Cardiovascular and Respiratory Drugs
Cardiovascular and respiratory drugs include antihypertensives, diuretics, antianginal agents, antiarrhythmics, cardiac glycosides, anticoagulants, bronchodilators, corticosteroids and cough medicines. Questions focus on mechanisms, indications, contraindications, toxicity and monitoring, especially the difference between drugs that reduce blood pressure, improve cardiac output or open narrowed airways.
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50 free Cardiovascular and Respiratory Drugs MCQs from Nursing Pharmacology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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