Ondavell Injection is formulated with Ondansetron, a selective 5-HT₃ receptor antagonist that works by blocking the action of serotonin, a natural substance that may cause nausea and vomiting. It is commonly prescribed to prevent and treat nausea and vomiting associated with chemotherapy, radiation therapy, and surgery. . Please Note that product description, color, ingredients, package and other information maybe different from the original pack kindly check the product for more accurate details.