A patient taking hydralazine for hypertension develops a rapid pulse and facial flushing. Which explanation is most appropriate?
Correct answer: A. These findings may result from reflex sympathetic stimulation
- A. These findings may result from reflex sympathetic stimulation
- B. These findings show that the drug has caused severe hypoglycaemia
- C. These findings indicate direct suppression of the respiratory centre
- D. These findings confirm that the patient has digoxin toxicity
Explanation
Hydralazine causes arteriolar dilation, which may produce reflex sympathetic activation with tachycardia and flushing. Hypoglycaemia, respiratory depression and digoxin toxicity are not the expected primary effects of hydralazine.
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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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