Ondansetron is indicated for:
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Ondansetron is a potent, highly selective 5HT3 receptor antagonist. Its exact mechanism in controlling nausea and vomiting is not fully understood. Chemotherapy and radiotherapy can trigger the release of 5HT in the small intestine, which initiates a vomiting reflex by activating vagal afferents through 5HT3 receptors. Ondansetron blocks this reflex. Additionally, activation of vagal afferents can release 5HT in the area postrema on the floor of the fourth ventricle, promoting emesis via a central mechanism. Therefore, ondansetron likely manages nausea and vomiting induced by chemotherapy and radiotherapy by antagonizing 5HT3 receptors in both the peripheral and central nervous systems. While the mechanisms for postoperative nausea and vomiting are not entirely known, they may share pathways with those of cytotoxic-induced nausea and vomiting.
Postoperative nausea and vomiting (PONV) occur immediately after surgery and can continue for a day or two. This condition can be triggered by medications like anesthetics used during surgery. Ondansetron is effective in treating PONV by blocking the action of serotonin in the brain, thereby reducing nausea and vomiting.
Chemotherapy-induced nausea and vomiting (CINV) is a common side effect of cancer treatment. It can be severe and distressing, significantly affecting the patient's quality of life and treatment compliance. Ondansetron, a 5HT3 receptor antagonist, is used to treat nausea and vomiting caused by chemotherapy. It works by blocking serotonin, a natural substance that causes nausea and vomiting.
Radiation-induced nausea and vomiting (RINV) is a common side effect for cancer patients undergoing radiotherapy. Patients may feel sick during or for a short time after radiotherapy treatment. Ondansetron is used to manage RINV by preventing the action of serotonin, thus alleviating nausea and vomiting during radiotherapy sessions.
Ofran 8 blocks the action of serotonin, a chemical messenger in the brain that can cause nausea and vomiting, especially during anti-cancer treatment or after surgery.
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