Question

A client with a suspected duodenal ulcer is tested for \(\mathbf{H}\). pylori. Which medication, noted in the client history, could produce a false negative result in the test? A. Ampicillin B. Digoxin (Lanoxin) C. Propoxyphene napsylate (Darvocet) D. Ibuprofen (Advil)

Short answer

Answer: A. Ampicillin

Step-by-step solution

Identify the function of each medication

Ampicillin is an antibiotic; Digoxin (Lanoxin) is a medication used to treat heart failure and arrhythmias; Propoxyphene napsylate (Darvocet) is a narcotic analgesic used to control pain; Ibuprofen (Advil) is a nonsteroidal anti-inflammatory drug (NSAID) used to treat mild to moderate pain, inflammation, and fever.

Analyze the relationship between the medications and H. pylori test

We must evaluate how each medication affects the H. pylori bacteria or the test itself. Ampicillin, being an antibiotic, would affect the bacteria and possibly suppress their growth leading to false negative results. Digoxin, Propoxyphene napsylate, and Ibuprofen have no significant effect on the bacteria or the test.

Determine which medication can cause a false negative result

From our analysis, it becomes clear that Ampicillin can influence a false negative result because it might suppress the growth of H. pylori bacteria. The other medications are not likely to produce a false negative result in the test.

Choose the medication that might produce a false negative result

The medication that could produce a false negative result in an H. pylori test for a client with a suspected duodenal ulcer is: A. Ampicillin