Final answer:
Dexamethasone and Methylprednisolone are glucocorticoid steroids used as antiemetics. They work by blocking certain substances that cause inflammation and immune responses, reducing symptoms of nausea and vomiting.
Step-by-step explanation:
Dexamethasone and Methylprednisolone are both glucocorticoid steroids commonly used as antiemetics to treat nausea and vomiting. The mechanism of action (MOA) of Dexamethasone and Methylprednisolone involves blocking the release of certain substances in the body that cause inflammation and immune responses. By inhibiting these substances, they help to reduce inflammation and suppress the immune system, which can help alleviate symptoms of nausea and vomiting.