A patient with asthma is prescribed to use albuterol via inhaler before rigorous exercise. Which statement best describes the mode of action for this medication?
Albuterol is an anticholinergic causing dryness of bronchial secretions
Albuterol stimulates the parasympathetic nervous system causing the heart rate to decrease.
Albuterol is a beta 2 adrenergic agonist which relaxes bronchial smooth muscle.
Albuterol is an antihistamine, causing a block in the histamine response.
The Correct Answer is C
A. Albuterol is an anticholinergic causing dryness of bronchial secretions: Albuterol does not have anticholinergic properties and does not reduce secretions. Its primary action is bronchodilation, not secretion management.
B. Albuterol stimulates the parasympathetic nervous system causing the heart rate to decrease.: Albuterol is not a parasympathetic stimulant and can actually cause mild tachycardia due to beta-1 effects. Decreasing heart rate is not part of its therapeutic action in asthma.
C. Albuterol is a beta 2 adrenergic agonist which relaxes bronchial smooth muscle.: Albuterol selectively activates beta-2 receptors in the airways, causing smooth muscle relaxation and bronchodilation. This prevents exercise-induced bronchospasm and improves airflow, making it the first-line rescue medication for asthma.
D. Albuterol is an antihistamine, causing a block in the histamine response.: Albuterol does not block histamine receptors and does not prevent allergic responses. Its mechanism targets beta-2 adrenergic receptors to dilate airways, not histamine pathways.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. To treat hyperlipidemia: Brilinta does not lower cholesterol or alter lipid pathways. Hyperlipidemia requires medications that directly modify lipid metabolism, such as statins. Using Brilinta for this purpose would leave the lipid disorder untreated.
B. To prevent thrombotic events in patients with acute coronary syndrome: Brilinta inhibits the P2Y12 receptor on platelets, reducing aggregation and decreasing the likelihood of clot formation. This protects against stent thrombosis and recurrent myocardial infarction in ACS patients. It is routinely paired with aspirin as part of dual antiplatelet therapy.
C. To manage hypertension: Brilinta has no effect on vascular resistance, cardiac output, or renal sodium handling, which are the main targets of antihypertensive therapy. Blood pressure control relies on medications such as ACE inhibitors, beta blockers, or diuretics.
D. As a first-line treatment for heart failure: Brilinta does not improve myocardial function or counteract the neurohormonal changes that worsen heart failure. Effective treatment requires medications like ACE inhibitors, beta blockers, or ARNI therapy.
Correct Answer is A
Explanation
A. Triptans: Triptans are selective serotonin receptor agonists that constrict cranial blood vessels and reduce inflammation, directly relieving acute migraine symptoms. They are first-line therapy for moderate to severe migraine attacks and provide rapid symptom relief, including headache and associated nausea or sensitivity to light.
B. Antidepressants: Antidepressants, such as amitriptyline, are primarily used for migraine prevention rather than acute treatment. They modulate neurotransmitters to reduce migraine frequency over time but do not provide immediate relief during an active attack.
C. Antibiotics: Antibiotics have no role in treating migraines because migraine pathophysiology is neurologic and vascular, not infectious. Using antibiotics would not alleviate pain or associated migraine symptoms and could contribute to unnecessary side effects.
D. Beta-blockers: Beta-blockers, such as propranolol, are used for migraine prophylaxis to prevent future attacks, not for acute symptom relief. They work by reducing sympathetic nervous system activity but do not provide immediate relief once a migraine has started.
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