The healthcare provider orders Benadryl 40 mg IM now. The available concentration is 25 mg/mL. How many mL will the patient receive?
0.6 mL
1.6 mL
2 mL
1 mL
The Correct Answer is B
Choice A reason: For 40 mg at 25 mg/mL: 40 ÷ 25 = 1.6 mL. Choice A (0.6 mL) delivers 15 mg (0.6 × 25), underdosing Benadryl, which could fail to relieve allergic symptoms or sedation needs, making this choice incorrect for the prescribed dose.
Choice B reason: Calculating 40 mg ÷ 25 mg/mL = 1.6 mL accurately delivers the ordered 40 mg of Benadryl (diphenhydramine) for allergy or sedation. This ensures therapeutic efficacy without overdose, aligning with safe administration for intramuscular delivery, making this the correct choice.
Choice C reason: For 40 mg, the volume is 40 ÷ 25 = 1.6 mL. Choice C (2 mL) delivers 50 mg (2 × 25), overdosing Benadryl, risking excessive sedation or anticholinergic effects like dry mouth or confusion, making this choice incorrect and potentially unsafe.
Choice D reason: The correct volume is 1.6 mL (40 ÷ 25). Choice D (1 mL) delivers 25 mg (1 × 25), underdosing Benadryl, which may not achieve therapeutic effects for allergies or sedation, making this choice inadequate for the prescribed dose.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: Opioid tolerance does not reduce constipation; it may persist or worsen. Tolerance primarily reduces pain relief, so this is incorrect for the effect.
Choice B reason: Respiratory depression risk may not increase with tolerance, as sensitivity to this effect also diminishes. Analgesia is most affected, so this is incorrect.
Choice C reason: Euphoria typically decreases with tolerance, not increases, as receptor sensitivity drops. Reduced analgesia is the primary effect, so this is incorrect.
Choice D reason: Opioid tolerance leads to decreased analgesic effect, requiring higher doses for pain relief. This is the hallmark of tolerance, making it the correct choice.
Correct Answer is B
Explanation
Choice A reason: Renal artery ligation stenosis is affected by beta-blockers’ renin reduction, but asthma’s bronchoconstriction risk is more immediate. Respiratory effects are critical, so this is incorrect.
Choice B reason: Nonselective beta-blockers can cause bronchospasm in asthma by blocking beta-2 receptors. This is a major concern, making it the correct disease to prioritize.
Choice C reason: Diabetes mellitus may mask hypoglycemia with beta-blockers, but asthma’s acute airway risk is more severe. Respiratory issues take precedence, so this is incorrect.
Choice D reason: Coronary artery disease benefits from beta-blockers’ cardiac effects. Asthma’s bronchoconstriction risk is more concerning, so this is incorrect for the primary concern.
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