What is the primary use of Zofran?

Zofran, known generically as ondansetron, is primarily used to prevent nausea and vomiting. Its main application is in managing these symptoms, particularly when related to chemotherapy, radiation therapy, or surgery. Zofran works by blocking the actions of chemicals in the body that can trigger nausea and vomiting, making it especially effective for patients undergoing treatments that have a high potential for inducing these side effects.

The other choices do not accurately reflect the primary indication for Zofran. For instance, while headaches are often treated with various medications, Zofran is not indicated for this purpose. Similarly, it does not have a role in managing cholesterol levels or treating anxiety, which are addressed by entirely different classes of medications. Thus, option B stands out as the correct answer, as it precisely describes the intended use of Zofran.