Ondansetron is commonly used to prevent what?

Ondansetron is a medication that is primarily used to prevent nausea and vomiting. This is particularly important in clinical settings where patients may experience these symptoms due to various reasons, such as postoperative recovery, chemotherapy, or radiation therapy. The drug works by blocking the action of serotonin, a neurotransmitter in the body that can trigger nausea and vomiting, particularly through the gastrointestinal tract and the central nervous system.

In many medical situations, managing nausea and vomiting is critical as these symptoms can lead to dehydration, electrolyte imbalances, and prolonged hospital stays. By effectively preventing these symptoms, ondansetron helps improve patient comfort and outcomes during treatment.

This distinguishes it clearly from the other options, which do not relate to the primary use of ondansetron. For example, while managing postoperative pain, treating angina attacks, and preventing infections are all vital aspects of patient care, they are not the intended use of ondansetron. Thus, the choice highlighting its role in preventing nausea and vomiting is accurate and aligns with established medical protocols.