(7) Contraindications: patients with active gastrointestinal ulcers / bleeds, or patients with recurrent ulcers / bleeds. (8) Drug analysis: Diclofenac sodium sustained-release tablets can promote the combination of arachidonic acid and triglyceride, reduce the concentration of free arachidonic acid in the cell, and indirectly inhibit the synthesis of leukotriene. It is a non-steroidal anti-inflammatory drug that has a stronger inhibitory effect on prostaglandin synthesis than oral diclofenac sodium sustained-release tablets aspirin and indomethacin. Used to reduce postoperative pain and inflammation.