The nurse is administering diphenhydramine (Benedryl), a neuropharmacologic agent that works by doing what?

Preventing mast cells from releasing histamine

Preventing receptor activation by binding to histamine receptors

Prevent axonal conduction

Promote receptor activation to H1 histamine receptors

Answer and Explanation

The Correct Answer is B

Choice A rationale: Diphenhydramine blocks the action of histamine by binding to H1 receptors, rather than preventing its release from mast cells.
Choice B rationale: Diphenhydramine works by blocking the activation of histamine receptors, preventing the effects of histamine.
Choice C rationale: Diphenhydramine is not involved in preventing axonal conduction.
Choice D rationale: Diphenhydramine is an H1 receptor antagonist and does not promote receptor activation.

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Correct Answer is B

Explanation

Choice A rationale: Administering the medication with an empty stomach may enhance absorption but is not the best strategy for addressing "on-off" episodes.
Choice B rationale: The correct answer. High-protein foods can interfere with the absorption of levodopa, leading to "on-off" episodes.
Choice C rationale: Vitamin B6 supplementation is not typically used to address "on- off" episodes associated with levodopa/carbidopa.
Choice D rationale: Discontinuing the drug for 10 days (a "drug holiday") is not recommended and may result in a worsening of symptoms.

A. Increased speed of conduction and gluconeogenesis B. Bronchodilation and increased heart rate, contractility, and conduction C. Increased vasodilation and enhanced myocardial contractility D. Bronchoconstriction and increased heart rate

Correct Answer is B

Explanation

Choice A rationale: Epinephrine does increase the speed of conduction, but it does not significantly contribute to gluconeogenesis.
Choice B rationale: Epinephrine is used in cardiac arrest to increase heart rate, contractility, and conduction. In asthma, it causes bronchodilation.
Choice C rationale: While epinephrine can cause some vasodilation, it is not a primary indication for its use in cardiac arrest or status asthmaticus.
Choice D rationale: Epinephrine causes bronchodilation, not bronchoconstriction.

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The nurse is administering diphenhydramine (Benedryl), a neuropharmacologic agent that works by doing what?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A patient taking levodopa/carbidopa for Parkinson disease experiences frequent "on-off" episodes (ie, the abrupt loss of effects) Which action by the nurse is best?

Correct Answer is B

Explanation

Epinephrine is used to treat cardiac arrest and status asthmaticus because of which of the following actions?

Correct Answer is B

Explanation

After an intramuscular injection of penicillin, a patient develops severe difficulty breathing and a swollen tongue. Which medication should the nurse prepare to administer?

The nurse is caring for a patient with migraine headaches. Which assessment best indicates that suma agonist, is exerting the desired therapeutic effect?

The nurse receives a phone call from a patient who has been taking a CNS drug for 3 days. The patient medication causes nausea. Which response by the nurse is best?

A patient is prescribed a drug that causes the selective stimulation of beta2 receptors. The nurse should assess the patient for what?

A postoperative patient who received an intravenous infusion of morphine has a respiratory rate of 8 breaths per minute and is lethargic. Which as-needed medication should the nurse administer to the patient?

Which is the greatest teaching priority for a patient who has been prescribed varenicline?

Which neurotransmitter is active in both the peripheral and central nervous system (CNS)?

The nurse cares for a patient with seasonal allergies. The provider recommends phenylephrine [Neo-synephrine], an adrenergic agonist nasal spray to treat symptoms of allergic rhinitis. The nurse is most concerned if the patient makes which of the following statements?