The aim of this study is comparsion of intravenous acetaminophen with diclophenac suppository on postoperative pain in parturients sheduled for elective cesarean section under spinal anesthesia . This is randomized double blind clinical trial contianing placebo(phase 2-3)in 84 parturients with ASAclass1&2 candidate for cesareaction section under spinal anesthesia.patients with liver,renal.cardiac disease, hypertension,diabetes,allergic reaction,emergency cesarean,bleeding disorders &spinal anesthesia contraindications is excluded.After spinal anesthesia by 25 G needle and injection of 12.5 mg bupivacaine 0.5%in subarachnoid space cesarean is done.After skin closure in A group 1gr IV acetaminophen in 100ml N/S within 30 minutes association to placebo suppositoryand in D group 100ml intravenous N/S with diclophenac suppository is adminstrated and the same drug in obstetric ward.systolic & diastolic blood pressure;heart rate; blood oxygenation and VAS of pain in preadminstration,arrive to recovery,15 minutes after stay in recovery,exit of recovery and 2,4,6,12,18 and 24 hours after sergury,analgesic requirment,neusea and vomiting and patient satisfactionl is recorded.