Diclofenac sodium extended-release tablets have a factory expiration date of 18 to 36 months. The factory expiration date of the drug varies from manufacturer to manufacturer and from production specification to production specification. Patients should refer to the expiration date of the drugs sold by local pharmacies or hospitals and other regular channels. Diclofenac sodium extended-release tablets can relieve rheumatoid arthritis, osteoarthritis; treatment of various chronic arthritis acute attack or persistent joint swelling and pain; also used for a variety of soft tissue rheumatic pain or acute mild to moderate pain. Common adverse reactions after taking the drug include dizziness and headache, vertigo, nausea and vomiting, diarrhea, dyspepsia, loss of appetite, elevated transaminases, skin rash; occasionally myocardial infarction, heart failure, palpitations (rapid heartbeat, often accompanied by panic), chest pain; rare hypersensitivity reactions, somnolence, asthma, blood in the stools, gastritis, black stools, hepatitis, jaundice, urticaria and so on. This product is contraindicated in the following patients: those who are allergic to this product; patients with allergic reactions after taking aspirin or other non-steroidal anti-inflammatory drugs; patients with pain in perioperative treatment of coronary artery bypass grafting surgery; those who produce gastrointestinal bleeding after the use of non-steroidal anti-inflammatory drugs; active gastrointestinal ulcers or bleeding; patients with severe cardiac failure, hepatic and renal failure; and those who are less than three months pregnant. If you need to use this product, please consult a professional doctor, follow the doctor’s instructions, and rational use of medication.