A patient has had an overdose of an intravenous cholinergic drug. The nurse expects to administer which drug as an antidote?
Dobutamine
Atropine sulfate
Atenolol
Bethanechol
The Correct Answer is B
A. Dobutamine is a sympathomimetic drug used to increase cardiac output in conditions such as heart failure. It is not an antidote for cholinergic drug overdose.
B. Atropine sulfate is the antidote for cholinergic drug overdose. It acts as a competitive antagonist to acetylcholine at muscarinic receptors, counteracting the effects of excessive cholinergic stimulation.
C. Atenolol is a beta-blocker used to manage hypertension and certain cardiac conditions. It is not an antidote for cholinergic drug overdose.
D. Bethanechol is a cholinergic agonist used to stimulate bladder contractions in urinary retention. It is not an antidote for cholinergic drug overdose; in fact, it would exacerbate cholinergic effects.
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Related Questions
Correct Answer is D
Explanation
A. Do slow position changes to avoid falls from lowering blood pressure: This is not the priority teaching point for an anticholinergic medication. While some anticholinergics can cause orthostatic hypotension, the risk of urinary retention is a more significant concern.
B. If you feel short of breath, use a rescue inhaler: This instruction is unrelated to the use of anticholinergic medication and may be more relevant for patients with emphysema.
C. "If possible, try to avoid rooms that are cold.": Avoiding cold rooms is not directly related to the use of anticholinergic medication. The priority teaching point should address potential adverse effects specific to the medication.
D. "Make sure to seek care immediately if you're not able to urinate.": Anticholinergic medications can exacerbate urinary retention, particularly in older adults with benign prostatic hyperplasia. It's crucial for the patient to understand the importance of seeking medical attention if they experience difficulty urinating.
Correct Answer is C
Explanation
A. CT of the brain can proceed regardless of atropine administration, as it does not directly affect the assessment of brain stem reflexes.
B. Electroencephalogram (EEG) can also proceed regardless of atropine administration, as it evaluates brain electrical activity rather than brain stem reflexes.
C. Assessment of brain stem reflexes should be postponed until all atropine is excreted and no
longer exerting its effects. Atropine can mask or alter the pupillary response and other brain stem reflexes, such as gag reflex and cough reflex, which are important indicators of neurological function.
D. Pupil response assessment should be postponed until atropine effects have dissipated, as
atropine can cause pupillary dilation, which may interfere with accurate assessment of pupil size and reactivity
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