Granisetron Use, Blood Pressure, and Nausea and Vomiting During Cesarean Delivery Under Spinal Anesthesia

This study will observe 80 adults having a cesarean delivery under spinal anesthesia at Kayseri City Hospital. It will compare patients who receive granisetron as part of routine care to prevent nausea and vomiting with patients who do not receive preventive anti-nausea medicine. Granisetron use is decided by the treating anesthesiologist, not assigned by the study. Patients in the granisetron group receive the medicine within 5 minutes before or after spinal anesthesia. The main measurement is the total dose of ephedrine used during the operation. Ephedrine is a medicine used to treat low blood pressure. The study will also record low blood pressure at scheduled measurement points and nausea and vomiting during the operation. Patient enrollment is planned from October 15 to December 15, 2026.