A nurse is preparing to administer verapamil to a client who is 2 days postmyocardial infarction.
The nurse should monitor the client for which of the following outcomes as a therapeutic response to the medication?

Choice A rationale

Acyclovir is an antiviral medication that inhibits viral DNA synthesis. It reduces the severity and duration of varicella-zoster virus symptoms by targeting the virus directly.

Choice B rationale

Vancomycin is an antibiotic effective against Gram-positive bacteria. It is not effective against viral infections like varicella-zoster, which requires antiviral treatment.

Choice C rationale

Gentamicin is an aminoglycoside antibiotic used to treat Gram-negative bacterial infections. It is ineffective against varicella-zoster virus, which is a viral infection.

Choice D rationale

Quinine is an antimalarial medication used to treat malaria. It does not have antiviral properties and is not effective against varicella-zoster virus.

Choice A rationale

Alosetron does not significantly impact gastric acid production. Its primary function is to modulate serotonin receptors in the gut, not to alter the secretion of gastric acids.

Choice B rationale

Alosetron, a serotonin receptor antagonist, is used to treat irritable bowel syndrome (IBS) by decreasing the frequency of defecation. It slows colonic transit time, reducing bowel movements.

Choice C rationale

Alosetron decreases gastric motility rather than increasing it. It works by slowing down the movements of the intestines, which helps to manage diarrhea-predominant IBS.

Choice D rationale

Alosetron's mechanism does not include increasing the absorption of water into the intestine. It primarily affects the neurotransmitters involved in bowel movement regulation.