A patient with gastroesophageal reflux disease (GERD) is being managed with a proton pump inhibitor (PPI). During a follow-up visit, the patient reports new- onset diarrhea and abdominal pain. What is the nurse's priority action in this scenario?

Rationale:

A. Carafate (sucralfate) does not neutralize gastric acid. Unlike antacids, it does not chemically alter the pH of the stomach. While antacids temporarily reduce acid and provide symptomatic relief, sucralfate’s action is protective rather than neutralizing, focusing on shielding the ulcer from the harmful effects of acid, pepsin, and bile salts.

B. Carafate does not enhance gastric emptying or affect gastrointestinal motility. Prokinetic agents, such as metoclopramide, are used to increase gastric emptying and prevent reflux, but sucralfate’s mechanism is local mucosal protection, not altering the rate at which food or secretions move through the GI tract.

C. Carafate does not inhibit proton pumps or reduce gastric acid production systemically. Proton pump inhibitors (PPIs), like omeprazole, block the hydrogen-potassium ATPase enzyme in gastric parietal cells to suppress acid secretion. Sucralfate’s mechanism is mechanical and local, forming a protective barrier over the ulcer site rather than decreasing acid production.

D. Sucralfate forms a protective barrier over the ulcer site, binding to exposed proteins in the ulcer base to create a viscous, adhesive coating. This protective layer shields the ulcer from gastric acid, digestive enzymes, and bile salts, allowing the mucosal tissue to heal naturally while reducing pain and irritation. This barrier remains intact for several hours, making timing of administration important.

Rationale:

A. Scheduling serological testing for Lyme disease may be part of the diagnostic process, but early testing is often unreliable because antibodies may not be detectable in the first few weeks after infection. Waiting for test results can delay treatment and increase the risk of complications.

B. Assessing for neurological involvement, such as facial palsy, is important in later stages of Lyme disease. While the nurse should monitor for these signs, it is not the immediate priority in a client with early localized disease and a characteristic rash.

C. Administering a prescribed dose of doxycycline is the most appropriate initial action. Early antibiotic treatment for Lyme disease, especially when a bull’s-eye rash (erythema migrans) is present, is critical to prevent progression to more serious systemic manifestations, including neurological, cardiac, or musculoskeletal complications. Prompt initiation of therapy is more important than waiting for confirmatory testing.

D. Initiating a discussion about safe hiking practices is valuable for health promotion and prevention, but it does not address the client’s immediate need for treatment. Education can be provided after initiating therapy.