A Multicenter, Randomized, Double-Blind, Placebo-Controlled Trial of Intravenous Ibuprofen 400 and 800 mg Every 6 Hours in the Management of Postoperative Pain.

Exclusion Criteria

• •Those who can not understand the NRS score and cooperate with the evaluation; those who had head trauma or complicated with organic lesions of the central nervous system within 4 weeks before operation; those who developed coagulation dysfunction or took anticoagulants and antiplatelet drugs; those with a history of severe cardio-cerebrovascular disease, heart failure; those with liver and kidney dysfunction, severe endocrine system diseases, mental illness; those with a history of peptic ulcer or bleeding; those who did not control grade 2 or above hypertension or were still taking two or more of antihypertensive drugs such as angiotensin converting enzyme inhibitors (ACEI), angiotensin converting enzyme antagonists (ARB) and diuretics at admission; Increased toxicity due to the interaction of methotrexate, lithium preparations, etc. with the test drug; use of NSAIDs or analgesic muscle relaxants within 24 hours before operation, narcotic dependence or tolerance; allergy to ibuprofen or other NSAIDs; pregnant or lactating women