A client who has been diagnosed with exercise-induced asthma is prescribed zafirlukast (Accolate). Which of the following adverse effects would the nurse inform the client regarding zafirlukast (Accolate)?
Liver injury
bradycardia
renal failure
Bronchoconstriction
The Correct Answer is A
A) Liver injury: Zafirlukast (Accolate) has been associated with the risk of liver injury. It is important for clients to be informed about this potential adverse effect, as it may require monitoring of liver function tests during treatment. Symptoms of liver injury, such as jaundice, dark urine, or severe fatigue, should prompt clients to seek medical attention.
B) Bradycardia: Bradycardia is not a commonly associated adverse effect of zafirlukast. This medication primarily works as a leukotriene receptor antagonist and does not typically affect heart rate significantly. Clients should be aware of other more relevant side effects rather than bradycardia.
C) Renal failure: Renal failure is not a known adverse effect of zafirlukast. While kidney function should always be monitored in patients taking various medications, zafirlukast specifically does not have a direct association with renal failure.
D) Bronchoconstriction: While bronchoconstriction is a concern in asthma management, zafirlukast is designed to prevent bronchoconstriction by blocking leukotriene receptors. Therefore, it is not an adverse effect of the medication. In fact, its purpose is to help reduce the incidence of bronchoconstriction and improve asthma control.
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Correct Answer is B
Explanation
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 areinvolved 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.
Correct Answer is B
Explanation
A) Ipratropium bromide: While ipratropium is used to manage bronchospasm, it is typically not the first choice for acute asthma attacks. It has a slower onset of action compared to short-acting beta-agonists like albuterol and is generally used as an adjunct therapy rather than for immediate relief.
B) Albuterol: This medication is a short-acting beta-agonist that provides rapid relief of bronchospasm during an acute asthma attack. It works by relaxing the muscles in the airways, making it the preferred first-line treatment for quick relief in asthma exacerbations.
C) Salmeterol: This medication is a long-acting beta-agonist (LABA) used for long-term control of asthma symptoms, not for immediate relief. It has a delayed onset of action and should not be used as a rescue medication during an acute attack, as it may take longer to provide effects.
D) Budesonide: This is an inhaled corticosteroid that helps in controlling chronic inflammation associated with asthma. While important for long-term management, it is not effective for the rapid relief of acute symptoms and should not be used during an asthma attack.