Question 25 1 out of 1 points A patient has been prescribed a histamine-2 (H 2 ) receptor antagonist for the treatment of GERD. Why are H 2 RAs more effective than H 1 receptor antagonists in the treatment of diseases of the upper GI tract? Response Feedback: H 2 RAs block the effect of histamine at H 2 receptors, particularly those in the parietal cells of the stomach. Antihistamines that block histamine-1 (H 1 ) receptors, the most frequent site of action for antihistamines, do not affect H 2 receptor sites, and H 2 RAs do not block H 1 sites. H 1 sites are not prevalent in the GI tract. Both classes of drugs may be administered orally.
Question 26 1 out of 1 points A woman with an inflammatory skin disorder has begun taking prednisone in an effort to control the signs and symptoms of her disease. The nurse who is providing care for this patient should prioritize which of the following potential nursing diagnoses in the organization of the patient's care? Response Feedback: Treatment with glucocorticoids such as prednisone is associated with numerous adverse effects, including the risk for excess fluid volume. Constipation and impaired gas exchange are not among the most common adverse effects and CNS effects are normally limited to anxiety, mood swings, and insomnia rather than acute confusion. Question 27 1 out of 1 points Prior to administering a dose of 5-FU to a patient with pancreatic cancer, the nurse is conducting the necessary drug research. The nurse is aware that 5-FU is a cell cycle–specific chemotherapeutic agent. Which of the following statements best describes cell cycle– specific drugs? Response Feedback: Chemotherapeutic drugs that are most effective during a particular phase of the cycle are known as cell cycle– (or cell phase) specific, whereas drugs that act independently of a specific cell cycle (or cell phase) are cell cycle– nonspecific. Not all cell cycle–specific drugs achieve a synergistic effect with cell cycle–nonspecific drugs. These drugs are not named because of the particular sequence of cytotoxic events that they cause. Question 28 1 out of 1 points A patient develops diarrhea secondary to antibiotic therapy. He is to receive two tablets of diphenoxylate HCl with atropine sulfate (Lomotil) orally as needed for each loose stool. The nurse should inform him that he may experience Response Feedback: The most common adverse effects of diphenoxylate HCl with atropine sulfate are drowsiness and dizziness related to the drug's chemical similarity to meperidine, an opioid. Tachycardia is an adverse effect, not bradycardia. Muscle aches and an increase in appetite are not adverse effects of the drug. Question 29
1 out of 1 points Mr. Tan is a 69-year-old man who prides himself in maintaining an active lifestyle and a healthy diet that includes adequate fluid intake. However, Mr. Tan states that he has experienced occasional constipation in recent months. What remedy should be the nurse's first suggestion?
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- Summer '15
- Pharmacology, Irritable bowel syndrome, Ulcerative colitis, Helicobacter pylori