Ondansetron (Eq. to Ondansetron 2mg) is an antiemetic medication commonly used to prevent and treat nausea and vomiting caused by various conditions, including chemotherapy, radiation therapy, surgery, or gastrointestinal disorders. Ondansetron works by blocking serotonin receptors in the brain and gut, which are involved in triggering nausea and vomiting. It is particularly effective in preventing chemotherapy-induced nausea and vomiting, as well as in managing nausea following surgeries. The 2mg dose is typically used for acute symptoms, and the medication is available in different forms, including oral tablets, dissolvable tablets, and injections, depending on the patient’s needs. It should be used under medical supervision, especially in individuals with liver or heart conditions, to avoid potential side effects.