Comparison of Intravenous Ondansetron and Low Dose Ketamine in Preventing Post Spinal Shivering

Exclusion Criteria

• •Patients having a documented history of severe adverse reactions to ketamine or ondansetron.
• •Patients with cardiovascular disease documented in history.
• •Patients with hepatic disease documented in history and supported by lab results (AST 32-40U/L), ALT(10-40U/L).
• •Patients with renal disease documented in history and supported by lab results. Urea (10-50mg/dl) S/Creatinine (0.3-1.5mg/dl).
• •Patients with hyperthyroidism documented in history and supported by lab results.
• •Patients with history of mental illness, seizures and glaucoma.
• •Patients with known hypertension (BP greater than 140/90).
• •Haemodynamically unstable patients (BP\<100mmHg).
• •Patients with coagulopathy or other bleeding diathesis documented in history and supported by lab results.
• •Complicated prolonged surgeries in spinal anesthesia.