2. Post- tonsillectomy pain assessments; Pain intensity will be assessed postoperatively by the verbal rating scale (VRS; 0 = no pain, 1 = mild pain, 2 = moderate pain, 3= severe pain, and lastly 4= excruciating pain). VRS assessment will be performed immediately postoperative and 3, 6, 12 and 24h postoperatively. Analgesia will be given if requested or if the VRS≥2. Patients in Group A will receive diclofenac sodium 0.3 mg/kg iv, while patients in Group B will receive ketorolac tromethamine 0.5 mg/kg.