FOSapretero Injection is a medication that requires a prescription and is commonly used to prevent nausea and vomiting that can be caused by chemotherapy treatment This medication falls under the category of antiemetics which are drugs used to prevent or alleviate nausea and vomiting FOSapretero Injection works by inhibiting the action of a chemical messenger called neurokinin in the brain This mechanism of action helps to prevent the occurrence of nausea and vomiting during chemotherapy or other forms of anticancer treatment