A nurse is preparing to administer diphenhydramine to a client who is to receive a blood transfusion. The nurse should explain that the purpose diphenhydramine is to prevent which of the following manifestations of a transfusion reaction?

A. Chronic diarrhea: Overuse of laxatives is more likely to cause chronic constipation rather than chronic diarrhea. While some types of laxatives can lead to diarrhea as a side effect, chronic diarrhea is less common with laxative overuse compared to chronic constipation.

B. Chronic constipation
When the smooth muscle in the colon loses its tone due to overuse of laxatives, it can lead to chronic constipation. Laxatives work by stimulating bowel movements, but frequent or excessive use can lead to dependency and decreased natural bowel function. Over time, the colon may become less responsive to normal stimuli, resulting in difficulty passing stool and chronic constipation.

C. Frequent vomiting: Overuse of laxatives is not directly associated with frequent vomiting. Vomiting can occur as a result of various gastrointestinal issues, but it is not a typical consequence of laxative overuse.

D. Chronic nausea: While gastrointestinal symptoms such as nausea may occur as a side effect of some laxatives, chronic nausea is not a common consequence of laxative overuse. It is more likely to result from other underlying medical conditions or gastrointestinal disturbances.

A) Take as needed for pain relief.
Sucralfate is not used as an as-needed medication for pain relief. It is a gastroprotective medication that is typically taken regularly as prescribed, regardless of whether the client is experiencing pain.

B) Take the medication 1 hr before meals.
Sucralfate is a medication commonly used to treat peptic ulcer disease by forming a protective barrier over the ulcer, promoting healing and symptom relief. It should be taken on an empty stomach, at least 1 hour before meals, and at bedtime to maximize its effectiveness. Taking sucralfate before meals ensures that the medication can coat the ulcer and provide protection against gastric acid during digestion.

C) Store the medication in the refrigerator.
Sucralfate does not need to be stored in the refrigerator. It should be stored at room temperature away from moisture and heat, according to the manufacturer's instructions.

D) Take the medication with an antacid.
Sucralfate should not be taken with antacids because antacids can interfere with its effectiveness. Antacids can decrease the absorption of sucralfate, so it is important to separate the administration of sucralfate from antacids by at least 30 minutes to 1 hour.