What is the therapeutic effect of dobutamine?
Increases cardiac output
Promotes diuresis
increases blood pressure
Inhibits platelet aggregation
The Correct Answer is A
A. Increases cardiac output: Dobutamine is a beta-1 adrenergic agonist that primarily increases the strength of myocardial contractions, leading to enhanced cardiac output. It is commonly used in clients with heart failure or cardiogenic shock to improve tissue perfusion without significantly increasing heart rate.
B. Promotes diuresis: Dobutamine does not have a direct diuretic effect. While improved cardiac output may indirectly enhance renal perfusion and urine output, promoting diuresis is not its primary therapeutic action.
C. Increases blood pressure: Dobutamine may slightly increase systolic blood pressure due to improved cardiac output, but it is not primarily used as an antihypotensive agent. Its main role is enhancing myocardial contractility rather than raising blood pressure.
D. Inhibits platelet aggregation: Dobutamine has no effect on platelet function or aggregation. Its mechanism of action is limited to stimulating beta-1 receptors in the heart to improve contractility.
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Related Questions
Correct Answer is B
Explanation
A. Treatment for acute myocardial infarction: Apixaban is an oral anticoagulant used to prevent clot formation. It is not indicated as a primary treatment for acute myocardial infarction, although it may be used in certain patients with atrial fibrillation or thromboembolic risk.
B. Prevention of pulmonary embolism: Apixaban is indicated for the prevention and treatment of venous thromboembolism, including deep vein thrombosis and pulmonary embolism. It inhibits factor Xa, reducing the formation of blood clots in high-risk patients.
C. Treatment for chronic hypertension: Apixaban does not lower blood pressure and is not used to treat hypertension. Its anticoagulant effect targets clotting pathways rather than vascular resistance.
D. Prevention of renal failure: Apixaban has no direct effect on kidney function and is not used to prevent renal failure. Its role is limited to anticoagulation and reducing thromboembolic events.
Correct Answer is D
Explanation
A. Salivation: Diphenhydramine, an antihistamine with anticholinergic properties, typically reduces salivation rather than increases it. Excessive drooling is not a side effect of this medication.
B. Watery eyes: Diphenhydramine works to relieve allergic symptoms, including watery eyes, so this symptom is more likely to be a reason for taking the medication rather than a side effect.
C. Urinary frequency: Anticholinergic effects of diphenhydramine usually cause urinary retention, not increased frequency. Clients may experience difficulty voiding rather than needing to urinate more often.
D. Constipation: The anticholinergic action of diphenhydramine can slow gastrointestinal motility, leading to constipation. Clients should be advised about this potential side effect and strategies to prevent it, such as increased fluid and fiber intake.
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