Inclusion Criteria:  Patients between 18 and 70 years Patients undergoing RARP, LAVH or TLH ASA 1-3 Scheduled as inpatient surgery (at least 1 night) Body weight > 60 kg  Exclusion Criteria:  Refusal of the patient Cognitive impairment or no understanding of the Dutch language Allergy for salicylates or NSAID Pregnancy Active or history of peptic ulcer disease History of gastro-intestinal hemorrhage or perforation History of gastric bypass History of renal disease with creatinine > 1 mg/dl Haematological disease Tromboctopenia < 150000 / µl Current anticoagulant use Current clopidogrel use History of substance abuse or use of medication with a suppressive effect on the central nervous system