Granisetron is a drug used to prevent nausea and vomiting caused by chemotherapy or radiation therapy. It works by inhibiting serotonin receptors in the digestive system and brain, which are responsible for stimulating the vomiting center. This drug is given in the form of tablets or injections, depending on the patient's condition and the type of treatment.
Granisetron is characterized by its long-acting effect, which makes it suitable for preventing delayed nausea, which may appear several days after the treatment session. It may cause some side effects such as headache, constipation, or mild dizziness. Rarely, an irregular heart rhythm may occur, so it is important to follow up with a doctor and avoid taking any additional dose without direct medical supervision.