Which medication is indicated for suppression of cough? (Select all that apply)
Benzonatate [Tessalon]
Guaifenesin [Mucinex]
Dextromethorphan [Robitussin]
Codeine
Correct Answer : A,C,D
Choice A reason: Benzonatate suppresses cough by anesthetizing stretch receptors in the respiratory tract, reducing the cough reflex. It acts locally on nerve endings in the lungs and pleura, effectively decreasing cough frequency without systemic opioid effects, making it an appropriate choice for cough suppression.
Choice B reason: Guaifenesin is an expectorant, promoting mucus clearance by thinning secretions, not suppressing the cough reflex. It facilitates productive coughing rather than inhibiting it, making it ineffective for cough suppression and an incorrect choice for this indication in managing cough symptoms.
Choice C reason: Dextromethorphan suppresses cough by acting on the medulla’s cough center, reducing the urge to cough. As a non-opioid antitussive, it effectively controls non-productive cough without significant respiratory depression, making it a suitable and correct choice for cough suppression in various conditions.
Choice D reason: Codeine, an opioid, suppresses cough by acting on the central nervous system’s cough center, reducing reflex activity. It’s effective for non-productive cough but carries risks of sedation and dependency, making it a correct but cautiously used choice for cough suppression.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: Agonists activate receptors, mimicking endogenous ligands, not preventing activation. The drug blocks receptors, so this is incorrect for the described action.
Choice B reason: Antagonists prevent receptor activation by blocking ligand binding, inhibiting effects. This matches the drug’s action, making it the correct term.
Choice C reason: Potent describes a drug’s strength, not its mechanism of preventing receptor activation. Antagonist defines the action, so this is incorrect.
Choice D reason: Selective refers to targeting specific receptors, not preventing activation. Antagonist describes the functional role, so this is incorrect.
Correct Answer is A
Explanation
Choice A reason: Mannitol, an osmotic diuretic, reduces intracranial pressure by drawing fluid from brain tissue into the bloodstream. This is its primary use in head injuries, making it correct.
Choice B reason: Mannitol is not primarily for peripheral edema; it targets cerebral edema. Furosemide is used for peripheral fluid, so this is incorrect for mannitol’s purpose.
Choice C reason: Mannitol removes fluid, not restores it. extracellular fluid, aiming to reduce brain swelling. Restoring fluid is opposite its effect, so this is incorrect.
Choice D reason: Mannitol increases renal perfusion by promoting diuresis, not reducing it. Its main goal is intracranial pressure reduction, so this is incorrect.
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