Name one class of drugs used to mitigate nausea caused by chemotherapy.

5-HT3 receptor antagonists are a specific class of antiemetic drugs that play a crucial role in managing nausea and vomiting associated with chemotherapy. These medications work by blocking the action of serotonin at the 5-HT3 receptors, which are found in the gastrointestinal tract and the central nervous system. When chemotherapy agents are administered, they can trigger the release of serotonin, leading to nausea. By inhibiting this response, 5-HT3 receptor antagonists help to prevent or reduce the severity of nausea and vomiting, thereby improving a patient's overall comfort and ability to tolerate chemotherapy.

Other classes of drugs mentioned, such as analgesics, are primarily used to relieve pain rather than address nausea. Antibiotics are aimed at treating infections rather than nausea control. Corticosteroids may have some antiemetic properties but are not specifically classified as antiemetics designed primarily to prevent chemotherapy-related nausea. Thus, 5-HT3 receptor antagonists stand out as the correct choice for this question, as they are directly targeted for the prevention and treatment of chemotherapy-induced nausea and vomiting.