A client frequently takes diphenhydramine (Benadryl) to alleviate his upper respiratory symptoms associated with allergies. Which of the following mechanism of actions applies to diphenhydramine (Benadryl)?

stimulates effects of histamine by occupying all H receptor sites.

blocks effects of histamine by competing and occupying H1 receptor sites.

blocks effects of histamine by competing and occupying H2 receptor sites.

stimulates effects of histamine by increasing amount of H2 receptor sites.

Answer and Explanation

The Correct Answer is B

A. Stimulates effects of histamine by occupying all H receptor sites: This statement inaccurately describes the action of diphenhydramine. Instead of stimulating histamine effects, diphenhydramine actually blocks them, particularly at H1 receptors, which are involved in allergic responses.

B. Blocks effects of histamine by competing and occupying H1 receptor sites: This accurately describes the mechanism of action of diphenhydramine. As an antihistamine, it competes with histamine for binding to H1 receptor sites, effectively reducing symptoms of allergies, such as sneezing, itching, and nasal congestion.

C. Blocks effects of histamine by competing and occupying H2 receptor sites: This option is incorrect because H2 receptor antagonists are used primarily to reduce gastric acid secretion, not to treat allergic reactions. Diphenhydramine specifically targets H1 receptors, not H2 receptors.

D. Stimulates effects of histamine by increasing the amount of H2 receptor sites: This statement is also incorrect. Diphenhydramine does not stimulate histamine activity or increase receptor sites. Instead, it functions to inhibit the action of histamine at H1 receptors, which is fundamental in alleviating allergy symptoms.

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Correct Answer is ["B","D","E","F"]

Explanation

A) Ipratropium is the drug of choice for acute asthma exacerbations: This statement is incorrect. While ipratropium is used in the management of asthma, it is not the first-line treatment for acute exacerbations. Short-acting beta-agonists, such as albuterol, are the preferred choice for rapid relief during an acute asthma attack due to their quick onset of action.

B) Mechanism of action includes blocking acetylcholine receptors in the airway: This statement is accurate. Ipratropium is an anticholinergic agent that works by blocking acetylcholine receptors in the bronchial smooth muscle. This action leads to bronchodilation and helps to decrease mucus production, making it effective for managing airway constriction.

C) Mechanism of action includes antagonizing histamine receptors of the upper airway: This statement is incorrect. Ipratropium does not act on histamine receptors; rather, it specifically targets acetylcholine receptors. Antihistamines are the medications that block histamine receptors, primarily used for allergic reactions and rhinitis, but not for bronchodilation in asthma.

D) Client's who are allergic to soybean should avoid taking ipratropium: This statement is true. Ipratropium bromide may contain soy lecithin, which can pose a risk for patients with soybean allergies. Therefore, it is essential for healthcare providers to assess a patient’s allergy history before prescribing this medication.

E) Urinary retention is a side effect of Ipratropium bromide: This is correct. Anticholinergic medications, including ipratropium, can lead to urinary retention as a side effect due to their action of inhibiting acetylcholine, which plays a role in bladder function. Patients should be monitored for this side effect, especially if they have a history of urinary issues.

F) Ipratropium (Atrovent) is a medication for asthma and chronic obstructive pulmonary disease (COPD): This statement is accurate. Ipratropium is indicated for both asthma and COPD management, as it helps to relieve bronchospasm and improve airflow. It is often used as an adjunct therapy in combination with other bronchodilators for better management of respiratory conditions.

A. This medication (Benadryl) targets h2 receptors to alleviate symptoms. B. Take this medication on an empty stomach before breakfast. Drowsiness is a common side effect of diphenhydramine (Benadryl) C. Avoid CNS depressants while taking diphenhydramine (Benadryl) D. This medication is a 2nd generation antihistamine. E. Paradoxical reactions can be seen with this medication.

Correct Answer is ["C","E"]

Explanation

A. This medication (Benadryl) targets H2 receptors to alleviate symptoms: This statement is incorrect. Diphenhydramine is an H1 receptor antagonist, not an H2 antagonist. H1 receptors are primarily involved in allergic reactions, whereas H2 receptors are related to gastric acid secretion.

B. Take this medication on an empty stomach before breakfast. Drowsiness is a common side effect of diphenhydramine (Benadryl): While drowsiness is indeed a common side effect, taking diphenhydramine on an empty stomach is not necessarily required and may lead to gastrointestinal discomfort. It can be taken with food if preferred.

C. Avoid CNS depressants while taking diphenhydramine (Benadryl): This is an important teaching point. Diphenhydramine can cause sedation, and the use of other CNS depressants (like alcohol or sedatives) can enhance this effect, increasing the risk of excessive drowsiness or other complications.

D. This medication is a 2nd generation antihistamine: This statement is incorrect. Diphenhydramine is actually a first-generation antihistamine. First-generation antihistamines tend to cause more sedation and other side effects compared to second-generation antihistamines, which are less sedating.

E. Paradoxical reactions can be seen with this medication: This is true. In some individuals, particularly children, diphenhydramine can cause paradoxical reactions, such as increased excitability or hyperactivity, rather than the expected sedation. This is an important consideration to discuss with clients.

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A client frequently takes diphenhydramine (Benadryl) to alleviate his upper respiratory symptoms associated with allergies. Which of the following mechanism of actions applies to diphenhydramine (Benadryl)?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A client currently taking ipratropium (Atrovent) presents to the healthcare setting for reevaluation of his current asthma status. Which of the following statements apply to ipratropium (Atrovent)? (Select All that Apply.)

Correct Answer is ["B","D","E","F"]

Explanation

A nurse is administering diphenhydramine (Benadryl) to a client experiencing a minor allergic reaction. Which information would the nurse include in the client's teaching plan regarding diphenhydramine (Benadry)? (Select All that Apply.)

Correct Answer is ["C","E"]

Explanation

A nurse is caring for a client who presents with chronic obstructive pulmonary disorder (COPD), Which of the following task can the nurse delegate to the UAP?

The nurse is assessing the medication record of a newly admitted client. Which of the following medications directly interacts with oxymetazoline (Afrin)?

A nurse is teaching a client who has a new prescription for dextromethorphan. The nurse should instruct the client to monitor for which of the following adverse effects when taking dextromethorphan?

A client suffering from asthma is placed on theophylline to reduce the frequency of acute attacks. Which of the following adverse effects would the nurse caution the client prior to discharge?

A client frequently takes diphenhydramine (Benadryl) to alleviate his upper respiratory symptoms associated with allergies. Which of the following mechanism of actions applies to diphenhydramine (Benadryl)?

A client diagnosed with allergic rhinitis is prescribed an antihistamine to assist with symptoms. Which of the following medications below would be considered a second-generation antihistamine?

The nurse is preparing to administer albuterol to a client experiencing an acute asthma attack. Which medication on the client's medical record is a direct contraindication to albuterol administration?

A client's severe asthma has necessitated the use of a long-acting beta2-agonist (LABA). Which of the client's statements suggests a need for further education?